涡轮叶片尾缘复合通道隔板结构

采用热色液晶测温法测量涡轮叶片尾缘带隔板的复合通道的温度场.研究复合通道中3种不同形状的隔板对换热和流阻的影响.主要在矩形隔板、90°波形隔板、120°波形隔板3种结构之间进行换热和流阻的比较.结果表明:在本实验评价指标下,2种形状的波形隔板的换热均好于矩形隔板,而且相对较小的压力损失;90°隔板在第1通道换热上好于120°隔板,第2通道两隔板的换热基本相当,但是90°隔板相对有较大的压力损失.

Different structure diaphragm plates in complex passages of turbine blade trailing edge

The experiment mainly conducted the effect of three different structure diaphragm plates in the complex passages on heat transfer and pressure drop characteristics of turbine blade trailing edge. A thermochromic liquid crystal method was used to measure the detailed heat transfer coefficients on the end wall surfaces. Comparison of end wall heat transfer and pressure drop characteristics was made among three kinds of diaphragm plates: rectangular diaphragm plates, 90° and 120°waved diaphragm plates in the complex passages of turbine blade trailing edge. It is found that two waved diaphragm plates produces higher heat transfer with relatively less press drop rather than the rectangular diaphragm plates, and the 90° waved diaphragm plates has higher heat transfer than the 120° waved diaphragm plates in the first passage. In the second passage the two conditions almost have the same effect, while the 90° diaphragm plates cost a higher pressure drop.