Title: Collaborative numerical simulation of hot gas flow over turbine blade using C-Denton method and comparison with Delaval nozzle

Authors: Morteza Mohammadi; Masoud Ziabasharhagh; Majid Nademi; Mostafa Mohammadi

Addresses: Mechanical Engineering Department, Islamic Azad University, Nour Branch, Sheikh Fazlollah Noori St., Nour, Iran ' Mechanical Engineering Department, K.N. Toosi University of Technology, No. 17 Pardis St., Mollasadra Ave., Vanak Sq., Tehran 19991 43344, Iran ' Mechanical Engineering Department, K.N. Toosi University of Technology, No. 17 Pardis St., Mollasadra Ave., Vanak Sq., Tehran 19991 43344, Iran ' Civil Engineering Department, Ghods Park, Mellat St., Rasht, Iran

Abstract: In this present study, dry superheated stream flow passing through turbine blade with determined configuration was investigated. Although viscosity effect can be affected on velocity and pressure, inviscid flow was taken into account because a boundary layer thickness is much smaller than turbine blade dimension. However, in order to anticipate the amount of loss occurred owing to viscosity, boundary layer effect must be completely considered. In this paper, 2D flow, unsteady inviscid gas was taken into account. It is worthwhile mentioning that after reaching to favourable convergence, steady state behaviour could be achieved and finally basic equation like continuity and momentum will be satisfied. It was proved that whenever flow reaches at leading edge of turbine blade, pressure will increase dramatically. At X/Chord = 0.95, there is a dramatic increase in Mach number which is sign of coincidence from pressure side wave to suction side wave.

Keywords: turbine blades; numerical simulation; C-Denton method; Delaval nozzle; inviscid flow; hot gas flow; viscosity; unsteady flow; Mach number; pressure side wave; suction side wave; blade edge.

DOI: 10.1504/IJESMS.2013.056694

International Journal of Engineering Systems Modelling and Simulation, 2013 Vol.5 No.4, pp.226 - 234

Published online: 30 Aug 2014 *

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