Volume 13, Issue 14 (Second Special Issue 2014)                   Modares Mechanical Engineering 2014, 13(14): 220-232 | Back to browse issues page

‎ 20.1001.1.10275940.1392.13.14.3.1

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Naderan Tahan M, Bahrainian S S. The Effect of Pressure Ratio Variations on Performance Characteristics of a Radial Twin Entry Turbine using Geometrical Modelling and Flow Simulation. Modares Mechanical Engineering 2014; 13 (14) :220-232
URL: http://mme.modares.ac.ir/article-15-1401-en.html
The Effect of Pressure Ratio Variations on Performance Characteristics of a Radial Twin Entry Turbine using Geometrical Modelling and Flow Simulation
Marzieh Naderan Tahan1 , Seyed Saied Bahrainian * 2
1- MSc Student / Shahid Chamran University of Ahwaz
2- Associate Profesor of Mechanical Engineering / Shahid Chamran University of Ahwaz
Abstract:   (5683 Views)
In this paper the effect of pressure ratios on the performance characteristics of a radial twin entry turbine is investigated using computer aided design (CAD) and computational fluid dynamics (CFD). First, geometric models of the turbine flow passages are constructed by simultaneous use of measuring tools and computer aided design software. Because of geometrical complexity of flow passages, tetrahedral cells are used to generate unstructured grid in the computational domain. Three dimensional flow of steady, viscous, and compressible nature is solved by Multiple Reference Frame (MRF) technique. Characteristic curves of the turbine are obtained by post processing flow simulation results. Mass flow parameter, delivered torque parameter and total to static turbine efficiency are plotted against different pressure ratios. Results show that at constant rotational speed, increasing pressure ratio leads to increase in mass flow parameter until choke limit while the total to static efficiency decreases and delivered torque increases.
Keywords: radial twin entry turbine, tetrahedral grid, characteristic diagrams, multiple reference frame (MRF)
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Article Type: Research Article | Subject: CFD|Manufacturing Methods
Received: 2013/05/20 | Accepted: 2013/09/4 | Published: 2014/02/20
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