Search results

1 – 10 of over 11000
Article
Publication date: 12 August 2020

Yujun Wang, Qiang Li, Shuo Zhang, Xinhao Tang, Weiwei Xu and Zhenbo Wang

The loading mechanism of textures considering turbulence has not been fully covered. This paper aims to investigate the effect of turbulence on the textured loading capacity under…

Abstract

Purpose

The loading mechanism of textures considering turbulence has not been fully covered. This paper aims to investigate the effect of turbulence on the textured loading capacity under water lubrication and to analyze the causes of the turbulence effect.

Design/methodology/approach

Computational fluid dynamic models with different textured shapes are established after validation. The transition shear stress transport (SST) model, which is suitable for predicting the transition process of fluid from laminar state to turbulent state, is adopted in the present study. To illustrate the effect of turbulence, the loading capacity of textures predicted by transition SST model and laminar model is compared.

Findings

The loading capacity is higher after considering turbulence because more lubricant enters into textures and the flow rate of lubricant to textured outlet increases. There exists an optimal textured depth ratio and density for loading capacity and the change of flow state would not affect the optimal values. The degree of fluid blockage at textured outlet has a dominant influence on loading capacity. As the textured shape changes to triangle or ellipse from rectangle, the vortices at the textured bottom move forward and the blockage at a textured outlet is enhanced, which makes loading capacity improved under the action of blocking effect.

Originality/value

The enhancement of the blocking effect is found to be crucial to the improvement of textured loading capacity after considering turbulence. Present research provides references to understand the loading mechanism of textures under turbulent conditions.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2020-0149/

Details

Industrial Lubrication and Tribology, vol. 73 no. 1
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 26 October 2012

M. Tutar and Ü. Sönmez

The purpose of this paper is to numerically study inflow turbulence effects on the transitional flow in a high pressure linear transonic turbine at the design incidence.

Abstract

Purpose

The purpose of this paper is to numerically study inflow turbulence effects on the transitional flow in a high pressure linear transonic turbine at the design incidence.

Design/methodology/approach

The three‐dimensional (3‐D) compressible turbulent flow in a turbine inlet guide vane is simulated using a finite volume based fluid solver coupled with dynamic large eddy simulation (LES) computations to investigate the effects of varying inflow turbulence length scale and the turbulence intensity on the aero‐thermal flow characteristics and the laminar‐turbulent transition phenomena. The computational analyses are extended to very high exit Reynolds number flow conditions to further study the effect of high exit Reynolds numbers on the transitional behavior of the present flow around the inlet guide vane cascades of the turbine. The calculations are performed with varying degree of inflow turbulence intensity values ranging from 0.8 to 6 percent and the inflow turbulence length scales ranging from one to five percent of pitch for different exit isentropic Mach and Reynolds numbers.

Findings

The numerical predictions in comparison with the experimental data demonstrate that the level of inflow turbulence closure provided by the present LES computations offers a reliable framework to predict complex turbulent flow and transition phenomena in high free‐stream turbulence environments of high pressure linear turbines.

Originality/value

This is the first instance in which both artificially modified random flow generation method in association with the dynamic procedure of LES application is employed to represent the realistic inflow turbulence conditions in the high pressure turbine and to resolve the transitional flow in a dynamic approach.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 22 no. 8
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 28 August 2019

Mir Dost, Munwar Hussain Pahi, Hussain Bakhsh Magsi and Waheed Ali Umrani

The purpose of this paper is to investigate the effects of internal and external sources of knowledge on frugal innovation (FI), and to what extent this relationship is…

1911

Abstract

Purpose

The purpose of this paper is to investigate the effects of internal and external sources of knowledge on frugal innovation (FI), and to what extent this relationship is strengthened/weakened, authors also analyzed the moderating role of market and technological turbulence.

Design/methodology/approach

This is an empirical research. Data were collected from 382 SMEs through questionnaire survey, applied SmartPLS technique to analyse the data.

Findings

Findings revealed the significant effects of internal and external sources of knowledge on FI. To what extent this relationship is strengthened/weakened, the moderating role of market and technological turbulence was analysed. Data revealed that the moderation of technological turbulence strengthens the effects internal and external sources of knowledge had on FI. Market turbulence strengthened the effects of external sources of knowledge but surprisingly weakens the effects of internal sources of knowledge on FI.

Practical implications

Findings provide valuable and timely insights for the modern managers as well. Managers who operate in SMEs will have to understand that how knowledge from internal and external sources can be gathered and utilized for producing frugal products. They also will have to weigh which source of knowledge is more important when there is market and technological turbulence.

Originality/value

Sustainable and social issues emerge mainly due to scarcity of available resources. Firms seek to solve such pressing issues through improvisation in resources. However, frugal products assist firms to significantly contribute in society and sustainability. Although prior research has discussed the importance of knowledge for innovation, yet the effects of sources of knowledge and role of contingencies mostly remain unexplained puzzle. This study contributes to knowledge-innovation literature by examining the missing link between different sources of knowledge and FI and how the moderation of technology and market turbulence strengthen/weaken this relationship. Authors believe that it also helps to comprehend FI’s enabling factors through which firms can capitalize upon, and solve the pressing sustainable and social issues.

Details

Journal of Knowledge Management, vol. 23 no. 7
Type: Research Article
ISSN: 1367-3270

Keywords

Article
Publication date: 1 August 2016

Liping Qian, Pianpian Yang and Yao Li

The purpose of this study is to reconcile the positive, non-significant and even negative effects of guanxi on firm performance from two aspects. First, it explores the linear and…

1169

Abstract

Purpose

The purpose of this study is to reconcile the positive, non-significant and even negative effects of guanxi on firm performance from two aspects. First, it explores the linear and curvilinear relationships between guanxi and distinct performance dimensions. Second, it examines the moderating effects of both exchange-related behavioral risk (reflected by contract enforcement in this study) and market-related environmental risk (reflected by market turbulence in this study) on the above relationship.

Design/methodology/approach

Based on data for 206 samples collected from distributors of house furnishings, computers and their components, a moderated regression is used to test the hypotheses.

Findings

The empirical test generally supports the conceptual model and demonstrates three findings. First, guanxi has a linear, positive effect on financial performance and an inverted U-shaped effect on strategic performance. Second, contract enforcement decreases the effect of guanxi on financial performance and enhances its effect on strategic performance. Third, market turbulence enhances the effect of guanxi on financial performance and weakens its effect on strategic performance.

Research limitations/implications

First, this study collects data only from China. Future studies should collect data from other emerging markets to allow for either model validation or cross-country comparisons. Second, the data come only from buyers, and suppliers’ viewpoints are not included. Third, in addition to contract enforcement and market turbulence, other important contingencies should be considered in the guanxi–performance link.

Practical implications

The results provide important implications for managers to manage guanxi in an emerging economy. Managers should be very clear about their primary goal (i.e. pursuing short-term financial revenue or long-term strategic targets); next, they should understand how to match guanxi with various levels of contract enforcement and market turbulence to achieve that goal.

Originality/value

First, prior research has documented guanxi’s role in channel relationships, but it has not achieved consistent conclusions. Second, although existing studies have analyzed the contingencies of guanxi at the firm level, market level and institutional level, another important contingency “the dyadic relationship condition” is rarely considered. Third, although the extant research has realized the value of guanxi contingent on various market conditions, conflicting views exist. This study contributes by addressing these issues.

Details

Journal of Business & Industrial Marketing, vol. 31 no. 7
Type: Research Article
ISSN: 0885-8624

Keywords

Article
Publication date: 5 December 2022

Xiaohong Xiao, Chengxu Zhou and Hongyi Mao

This study aims to investigate the impact of the two essential subjects of servitization (service and goods innovation) on customer satisfaction. The authors explained the paradox…

Abstract

Purpose

This study aims to investigate the impact of the two essential subjects of servitization (service and goods innovation) on customer satisfaction. The authors explained the paradox of servitization by determining how service innovation and goods innovation affect customer satisfaction interacting with environmental turbulence and marketing intensity.

Design/methodology/approach

The authors obtained 376 observations of 84 listed Chinese companies. On the basis of content analysis and measurement from secondhand data, the authors first tested the hypotheses in the fixed-effects model. The authors conducted a split-sample analysis by dividing environmental turbulence into two samples to explain the results effectively and better interpret the relationship between two innovations to customer satisfaction.

Findings

The results show that goods and service innovations positively affect customer satisfaction, but the effect of service innovation is more substantial. Furthermore, environmental turbulence negatively moderates the relationship between service innovation and customer satisfaction. The empirical results indicated that, if enterprises enhance marketing intensity, then the growth of environmental turbulence weakens the positive impact of goods and services innovation on customer satisfaction.

Originality/value

This study provided an understanding of the impact of servitization on intangible assets. This study also responded to previous literature’s call for research on the impact of external environmental factors on servitization.

Details

Journal of Business & Industrial Marketing, vol. 38 no. 10
Type: Research Article
ISSN: 0885-8624

Keywords

Article
Publication date: 14 June 2022

Ruida Li, Li Zheng and Ling Yuan

External environment drives established enterprises to employ management innovation. Drawing on dual-process theories, this paper purports to investigate TMT's intuitive and…

Abstract

Purpose

External environment drives established enterprises to employ management innovation. Drawing on dual-process theories, this paper purports to investigate TMT's intuitive and rational decision-making styles as mediating roles between perceived environmental turbulences and management innovation, and explain how organizational slack play an critical moderating role.

Design/methodology/approach

SPSS 25 is used to test 120 established enterprises' top management team (TMT) samples in China, and the moderated mediation model is empirically tested by using hierarchical regression analysis and conditional process analysis.

Findings

Perceived environmental turbulences promotes management innovation. Organizational slack as contextual variable influences the relationship between technology turbulence and TMT's decision-making styles. Interestingly, only perceived technology turbulence indirectly affects management innovation through TMT's intuitive decision-making when moderated by organizational slack. However, the indirect effect from perceived market turbulence to management innovation through TMT's rational decision-making is not significant when moderated by organizational slack.

Originality/value

Based on management innovation's human agency perspective, TMT's decision-making styles have not been discussed in research on management innovation. This paper sheds light on TMT's decision-making styles as mediating role.

Details

Journal of Organizational Change Management, vol. 35 no. 7
Type: Research Article
ISSN: 0953-4814

Keywords

Article
Publication date: 29 June 2018

Lejla Turulja and Nijaz Bajgoric

The purpose of this paper is to draw on dynamic capability view and contingency theory to clarify the nature of the effect of environmental turbulence on the relationships between…

3146

Abstract

Purpose

The purpose of this paper is to draw on dynamic capability view and contingency theory to clarify the nature of the effect of environmental turbulence on the relationships between firm’s both product and process innovations and business performance.

Design/methodology/approach

The authors developed and empirically tested two structural models using structural equation modeling approach. The first model deals with both product and process innovations as the mediators between environmental turbulence and business performance. The second model considers the moderating effect of environmental turbulence between innovation and business performance.

Findings

The findings show that environmental turbulence does not moderate the relationship between innovation and business performance. The authors have found a clear role of environmental turbulence in boosting innovation rather than moderating the relationship between innovation and performance.

Research limitations/implications

The data set is a cross-section of heterogeneous firms regarding the industry.

Practical implications

Managers should be aware of the importance of the innovation for the environmental turbulence and dynamism counteracting. The results imply a negative influence of environmental turbulence on business performance. However, with the innovation in the equation, this influence can be positive, because it boosts firms to innovate and though to achieve better business performance.

Originality/value

It contributes the management and innovation research and practice through offering insights into the role of environmental turbulence in product innovation, process innovation as well as organizational business performance through comprehensive analysis of mediation and moderation effects between the observed constructs.

Details

European Journal of Innovation Management, vol. 22 no. 1
Type: Research Article
ISSN: 1460-1060

Keywords

Article
Publication date: 1 January 1932

Hugh L. Dryden

THE subject of turbulence is one of great interest in the field of aerodynamics, and many investigations are in progress in the aerodynamical laboratories of the world on various…

Abstract

THE subject of turbulence is one of great interest in the field of aerodynamics, and many investigations are in progress in the aerodynamical laboratories of the world on various aspects of the subject. The recent international co‐operative measurements inaugurated under the auspices of the National Physical Laboratory of Great Britain have shown that turbulence is a factor of considerable importance in determining the forces acting on bodies in an air stream, and the chief question of the day is whether it is desirable to have large or small turbulence in wind tunnels.

Details

Aircraft Engineering and Aerospace Technology, vol. 4 no. 1
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 11 May 2015

Mikael Hilmersson, Susanne Sandberg and Firouze Pourmand Hilmersson

– The purpose of the study is to examine the political sources of uncertainty in the internationalization process of small- and medium-sized enterprises (SMEs).

2185

Abstract

Purpose

The purpose of the study is to examine the political sources of uncertainty in the internationalization process of small- and medium-sized enterprises (SMEs).

Design/methodology/approach

The authors theoretically derived a research model embracing three hypotheses. These hypotheses are tested on a sample of 203 on-site interviewed SMEs. Regression analysis is used to test two individual hypotheses and one interaction effect.

Findings

The regression analysis reveals that political knowledge possessed by the firm reduces uncertainty in the internationalization process. Political turbulence is shown to increase uncertainty in the internationalization. The interaction shows that political turbulence obliterates the uncertainty reducing effect by political knowledge.

Research limitations/implications

The authors identifies two main political sources of uncertainty in the internationalization process of SMEs. For managers and business researchers, it is shown that experiential knowledge is useful under stable conditions. When turbulence increases, however, firms need to develop alternative strategies for uncertainty management.

Originality/value

This study is the first to test the uncertainty reducing effects of experiential knowledge in turbulent environments. Thus, by running the interaction between political knowledge and political turbulence, the authors shed new light on the usefulness of previous experiences in the internationalization process.

Details

European Business Review, vol. 27 no. 3
Type: Research Article
ISSN: 0955-534X

Keywords

Article
Publication date: 10 June 2020

Jianhui Yan, Yu Zheng, Jiaxin Bao, Chongyu Lu, Yanhui Jiang, Zhi Yang and Chulan Feng

This paper aims to investigate how to improve new product performance in turbulent circumstances of emerging economies.

1356

Abstract

Purpose

This paper aims to investigate how to improve new product performance in turbulent circumstances of emerging economies.

Design/methodology/approach

This paper used regression analysis to examine the performance impact of customer relationship management (CRM) and product development management (PDM) concentration strategy in new product development (NPD). A detailed contingent analysis of the market and institutional environments in emerging economies is also conducted based on a survey of 114 Chinese high-tech manufacturers.

Findings

The research findings show that PDM has a stronger positive effect on new product performance than CRM in emerging economies and that the contingent effects of the market and institutional environment vary. More specifically, technological turbulence and enforcement inefficiency can positively moderate the relationship between CRM and new product performance, whereas the moderating effect of market turbulence on CRM is negative. Meanwhile, enforcement inefficiency negatively moderates the effect of PDM on new product performance, while the moderating effect of market turbulence on PDM is positive.

Research limitations/implications

This paper is limited to a survey of high-tech manufacturing enterprises in China. Further research should continues to explore and document the strategic issue about NPD in emerging economies by longitudinal study.

Originality/value

This paper contributed to theoretical and practical initiatives on the strategic issue of NPD and provided firms a further understanding of how to select the right NPD strategy in emerging economies to improve new product performance.

Details

Journal of Business & Industrial Marketing, vol. 36 no. 1
Type: Research Article
ISSN: 0885-8624

Keywords

1 – 10 of over 11000