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Article
Publication date: 8 May 2017

Hilmi Amiruddin, Wan Mohd Faizal Wan Mahmood, Shahrir Abdullah, Mohd Radzi Abu Mansor, Rizalman Mamat and Azri Alias

The purpose of this study is to determine the best vaned diffuser design that can generate higher pressure output at a predetermined speed.

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Abstract

Purpose

The purpose of this study is to determine the best vaned diffuser design that can generate higher pressure output at a predetermined speed.

Design/methodology/approach

Several vaned diffusers of thin, flat-type design with different number of blades and blade angle were fabricated. The vaned diffusers were fitted inside the turbocharger compressor and test on a cold-flow turbocharger test rig. A Taguchi L27 orthogonal array is selected for analysis of the data. Influence of number of blades, blade angle and rotational speed on output pressure is studied using the analysis of variance (ANOVA) technique. Finally, confirmation tests are conducted to validate the experimental results.

Findings

The optimum design parameters of the vaned diffuser using signal-to-noise ratio analysis were six blades type, blade angle of 18° and rotational speed of 70,000 rpm. Results from ANOVA showed that the speed has the highest influence on output pressure. The number of blades and blade angle produced the least effect on the pressure output.

Originality/value

The study used the turbocharger with the impeller size 60 mm and adapted vaned diffuser to increase the output pressure.

Details

Industrial Lubrication and Tribology, vol. 69 no. 3
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 21 February 2018

Omran AlShamsi and Mian Ajmal

The purpose of this paper is to identify the critical factors that impact knowledge sharing (KS) and their importance in technology-intensive service organizations in the United…

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Abstract

Purpose

The purpose of this paper is to identify the critical factors that impact knowledge sharing (KS) and their importance in technology-intensive service organizations in the United Arab Emirates (UAE).

Design/methodology/approach

An extensive literature review was conducted to identify the critical factors for KS in technology-intensive organizations. Then, an analytical hierarchical process (AHP) was applied to prioritize the primary criteria and sub-criteria. This study consists of nine primary criteria and 34 sub-criteria that are relevant to KS in technology-intensive organizations.

Findings

The results show that organizational leadership (OL) is the most important factor that impacts KS in technology-intensive organizations, which is followed by organizational culture (OC), organizational strategy (OSY), corporate performance (CP), organizational process (OP), employee engagement (EE) and organizational structure (OST). According to the results, the least impactful factor is human resource management (HRM).

Research limitations/implications

Because the results in this study were only obtained from service organizations, future studies can include manufacturing organizations from different countries and additional success factors. Future studies could also use structural equational modelling methodology for better understanding the relations among these critical factors for KS.

Originality value

This paper is one of the first in the UAE to examine the broad range of critical success factors for KS in technology-intensive organizations.

Details

Journal of Knowledge Management, vol. 22 no. 2
Type: Research Article
ISSN: 1367-3270

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