ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Investigation of Airflow Allocation Inside High Pressure Turbine Rotor Blade
Received date: 2013-12-30
Revised date: 2014-06-06
Online published: 2014-09-19
Supported by
Foundation of Jiangsu Innovation Program for Graduate Education (KYLX_0307); the Fundamental Research Funds for the Central Universities
Conjugate heat transfer simulation is used to conduct investigations aiming at obtaining the cooling performance of the internal cooling structures of a certain turbine rotor blade in this paper. Effects of three different airflow allocation methods on the cooling effect of the blade are analyzed under the condition of the same total airflow. Subsequently, the cooling structure with the best cooling performance is chosen to discuss the influence of rotational speed on total inlet pressure and overall cooling effectiveness. The results show that Model B produces more reasonable airflow allocation, obtaining more uniform temperature distribution and higher overall cooling effectiveness. The cooling airflow deflects due to the existence of Coriolis force and centrifugal buoyancy force. The stagnation line located at the blade leading edge is forced to shift from pressure side to suction side with the increase of rotational speed and the film discharges are also changed with the rotational speed. The increasing rotational speed leads to an improvement on pressure surface cooling effectiveness and inversely a decrement on suction surface cooling effectiveness.
ZHU Xingdan , TAN Xiaoming , GUO Wen , ZHANG Jingzhou , WANG Yongming . Investigation of Airflow Allocation Inside High Pressure Turbine Rotor Blade[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(12) : 3273 -3782 . DOI: 10.7527/S1000-6893.2014.0193
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