The function of the turbine aerofoil is to turn the flow to a certain angle and provide smooth flow acceleration to a certain Mach number with minimum pressure loss. The flow field in the blade passage is complex, unsteady, transonic, and three dimensional. So, to aerodynamic designer, it is necessary to evaluate the profile losses and other aerodynamic performance parameters to improve the efficiency of the turbine stage. In the present study, CFD simulation has been carried out for the high-pressure turbine nozzle guide vane (NGV) profiles for design and off-design conditions. Parameters such as profile loss coefficient, surface Mach number distribution, and flow deflections are investigated. The results obtained from numerical analysis are compared with experimental data from transonic cascade tunnel.
Numerical Investigation of Aerodynamic Performance Parameters in Linear Blade Cascade for High-pressure Turbine
Lect.Notes Mechanical Engineering
2022-07-24
11 pages
Article/Chapter (Book)
Electronic Resource
English
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