TS-47 Heat Transfer Measurements on a Turbine Nozzle Using Liquid Crystals(Session C-1 Heat Transfer 1)

概要

論文の詳細を見る
In the design of the recent gas turbine cooling blade, it is important to get accurate heat transfer coefficient distribution over the entire blade surface. This paper presents a measurement of heat transfer coefficients on three-dimensionally complex surfaces, in which thermochromic liquid crystals (TLC) are utilized to determine temperature distributions, and hence heat transfer distributions. The measurement technique using TLC is based on the unique relationship between temperature values and TLC tristimulus values (RGB). This technique was applied to a semiannular cascade surface in a low-speed steady flow tunnel with Reynolds number of 1.6×10^6 and turbulence intensity of 2.1%. The results agreed well with those measured by thermocouples and proved its validity, and the transition region in the suction surface was clearly obtained. Moreover, the comparison between numerical predictions and these results exhibited good agreement.
公益社団法人日本ガスタービン学会の論文
1999-11-14