Analysis of Rotating Cooling Effects with Oil for Turbine Blade

The air turbine can be used to solve the problems of fuel and power supply for Scramjet. The main obstacle is the cooling measure of turbine blades under limited cooling source. In this article, a new scheme was proposed to cool the blades with fuel used as coolant. Based on this oil cooling scheme, a three dimensional model was established to evaluate the feasibility and study heat transfer under rotation by numerical simulation. The results show that oil cooling scheme can efficiently reduce the temperature of blade with few negative effects on the performance of turbine. The temperature of blade can decrease greatly with the fuel mass flow rate of 1g/s. The maximum pressure of the coolant in the cooling channel can reach 114.5MPa in the rotating condition. Rotation effect enhances the turbulence intensity in the cooling channel and strengthens heat convection between the blade and fuel.