离散孔板气膜冷却对流换热系数的计算

Calculation of Heat Transfer Coefficients of Discrete Hole Board Film Cooling

通过对几种不同的气膜冷却对流换热系数的计算方法的归纳总结,提出用相对气膜冷却换热系数的方法来计算气膜冷却时的对流换热.在对6种不同开口规律的离散孔平板进行了实验研究的基础上,用热平衡法建立了离散孔板气膜冷却对流换热模型,用最小二乘法拟合了相应的关系式及关系曲线,并分析了来流参数及离散孔板的孔径、开口率等几何参数对气膜冷却对流换热系数的影响.

By analyzing the methods of calculating different heat transfer coefficients,the film cooling relative heat transfer coefficients was used to calculate the heat transfer.After six different discrete hole board being experimented,the model of heat transfer of discrete hole board film cooling was established.The effects on the film cooling heat transfer coefficients of the gas parameters of the flow and the geometric parameters of the discrete hole board were analyzed,and the transfer coefficients were obtained.Some useful conclusions such as the effects of the percent of the discrete hole area to the transfer coefficients were obtained.