ABSTRACT An axisymmetric, turbulent, multigrid computational fluid dynamics (CFD) code is used, on a parallel computing facility, to predict the mixing between superposed flows in a pre−swirl rotor−stator system, being a simplified representation of the internal air cooling system in gas turbine engines. Strong recirculations formed by the pre−swirl cross−flow lead to entrainment of disc−coolin...

Gas turbine inlet air-cooling (TIAC) is an established technology for augmenting gas output and efficiency, especially in hot regions. TIAC using evaporative cooling suitable hot, dry regions; however, the limited by ambient wet-bulb temperature. This study investigates two-stage under harsh weather of Riyadh city. The system consists indirect direct stages. In stage, air precooled water cooled...

Gas turbine (GT) performance is primarily dependent on the inlet air temperature. The power output of gas flow mass through turbine. This why at hot weathers with less dense air, drops, but cold weather high rises. cooling (IAC) technology one major drivers that enhance performance, especially during weathers. affected by various factors such as cooling, fuel type, heating value, temperature, h...

The addition of mist to a flow of steam or gas offers enhanced cooling for many applications, including cooling of gas turbine blades. The enhancement mechanisms include effects of mixing of mist with the gas phase and effects of evaporation of the droplets. An impinging mist flow is attractive for study because the impact velocity is relatively high and predictable. Water droplets, less than 1...

Keywords: Film cooling of turbine blades Cooling effectiveness quantification Effects of coolant-to-mainstream density ratio PIV measurements PSP technique Mass transfer analog a b s t r a c t An experimental study was conducted to investigate the performance of film cooling injection from a row of circular holes spaced laterally across a flat test plate. While a high-resolution Particle Image ...

Blade cooling is a relevant topic in the design of modern gas turbine engines, because of the increase in performance due to the resulting increase in the inlet turbine temperature is counteracted by a corresponding decrease due to the air extraction from the high-p compressor. In this paper, a previous model published by De Paepe & Dick is revisited and extended: while the original model consi...

A power criterion for selecting the electric motor used in a gas turbine emulator is defined. The power criterion is derived in terms of the ratio of inertias between the gas turbine engine and the electric motor, rotational losses and load torque. The gas turbine emulator allows emulating the speed-torque behavior of a gas turbine engine. Using simulation models, we show that the steady-state ...

In this paper, energy and exergy analysis of typical gas turbines is performed using average hourly temperature and relative humidity for selected Gulf cities located in Saudi Arabia, Kuwait, United Arab Emirates, Oman, Bahrain and Qatar. A typical gas turbine unit of 42 MW is considered in this study. The electricity production, thermal efficiency, fuel consumption differences between the ISO ...