在冷气干扰下叶栅绕流的控制方程及求解方法  

ON GOVERNING EQUATIONS AND CALCULATION METHOD OF CASCADE FLOWS PERTURBED BY COOLING AIR

作　　者：杨弘[1] 陈浮[1] 王仲奇[1] 

机构地区：[1]哈尔滨工业大学动力工程系,哈尔滨150001

出　　处：《工程热物理学报》1997年第3期311-314,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金

摘　　要：The injected cooling-air is taken as mass sources distributed in the mixing region, on which the governing equations in hyperbolic conservative form has been derived for the three dimensional flow and the circumferentially averaged flow in air-cooled turbine cacscades.Based on the continuity equations of the gas flow and the mixed flow, a formula has been worked out to specify the density of the mass source. A high discrimination and high-orderaccuracy TVD scheme has been applied to solve the governing equations. Two numerical proof calculations have been done on an annular-cascade flow and a single-stage-turbine averaged flow, through which some influences of air injection are studied on the variation ofthe shock waves and turbine aerodynamic performace.The injected cooling-air is taken as mass sources distributed in the mixing region, on which the governing equations in hyperbolic conservative form has been derived for the three dimensional flow and the circumferentially averaged flow in air-cooled turbine cacscades.Based on the continuity equations of the gas flow and the mixed flow, a formula has been worked out to specify the density of the mass source. A high discrimination and high-orderaccuracy TVD scheme has been applied to solve the governing equations. Two numerical proof calculations have been done on an annular-cascade flow and a single-stage-turbine averaged flow, through which some influences of air injection are studied on the variation ofthe shock waves and turbine aerodynamic performace.

关 键 词：冷气 叶栅绕流 控制方程 求解方法 燃气轮机 

分 类 号：TK471[动力工程及工程热物理—动力机械及工程]