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Design and Development of Low Subsonic Wind Tunnel for Turning Diffuser Application

Nordin, Normayati and Abdul Karim, Z. A. and Othman, Safiah and Raghavan, V. R. (2013) Design and Development of Low Subsonic Wind Tunnel for Turning Diffuser Application. Advanced Materials Research, 614 . pp. 586-591. ISSN 1662-8985

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Abstract

In practice, it is basically difficult even with controlled measurement environment to acquire a steady, uniform and fully developed flow. The flow entering diffuser was severely distorted despite a sufficient hydrodynamic entrance length already introduced. This was mainly due to the imperfect joining of duct and the abrupt change of the inlet cross-section applied. In this study, several basic features of a low subsonic wind tunnel, i.e. a centrifugal blower with 3-phase inverter, a settling chamber, screens and a contraction cone, are designed and developed for a turning diffuser application in order to improve the flow quality. The flow profiles are examined using Pitot static probe at five measurement points within the range of inflow Reynolds number, Rein= 5.786E+04-1.775E+05. The steady, uniform and fully developed turbulent flow profiles with an average deviation with theory of about 3.5% are obtained. This proves that a good flow quality could be produced by means of incorporating some basic features of a low subsonic wind tunnel to the system.

Item Type:Article
Subjects:T Technology > TJ Mechanical engineering and machinery
Academic Subject One:Fluid Dynamics
Academic Subject Two:Turning Diffuser
Academic Subject Three:Numerical Simulation
Departments / MOR / COE:Departments > Mechanical Engineering
Research Institutes > Energy
ID Code:8962
Deposited By: AP Dr Zainal Ambri Abdul Karim
Deposited On:28 Feb 2013 14:34
Last Modified:28 Feb 2013 14:34

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