CAJ | 학술논문

应用热流耦合计算和热风洞叶栅实验的方法，研究了燃气透平某亚音速叶型的气冷传热特性。实验叶片模化比为1．87，测量了冷气流量对冷却效率的影响，并基于一维传热计算模型，分析了实验测量结果的可靠性。通过对该模型叶片热流耦合的模拟，所得结果与实验结果的比较表明：是否准确地模拟叶片外表面燃气流动状态，是能否准确预测叶片表面温度和冷却效率的关键。带有γ-θ转捩的SST模型能较好的预测叶片前缘至中弦区域的传热过程，热流耦合计算结果与实验基本一致。本文工作为后续深入研究和评估燃气透平叶片内冷结构设计的效果，提供了的数值计算方法与实验基础。
응용열류우합계산화열풍동협책실험적방법，연구료연기투평모아음속협형적기랭전열특성。실험협편모화비위1．87，측량료랭기류량대냉각효솔적영향，병기우일유전열계산모형，분석료실험측량결과적가고성。통과대해모형협편열류우합적모의，소득결과여실험결과적비교표명：시부준학지모의협편외표면연기류동상태，시능부준학예측협편표면온도화냉각효솔적관건。대유γ-θ전렬적SST모형능교호적예측협편전연지중현구역적전열과정，열류우합계산결과여실험기본일치。본문공작위후속심입연구화평고연기투평협편내랭결구설계적효과，제공료적수치계산방법여실험기출。
In this paper , a method of thermal-flow coupled calculation and thermal wind tunnel cascades experiments was used to study the air-cooled heat transfer characteristics of a certain type of subsonic gas turbine airfoil .The mold ratio of the experimental vane is 1.87.Experimentally , we measured the effects of cooling air flow rate on cooling effectiveness and analyzed the reliability of the experi -mental results by means of one-dimensional heat transfer model .By simulating thermal-flow coupled heat transfer of the model vane , the comparison with experimental results shows that:accurate simulation of the gas flow state on the outer surface of vane is the key to accurately predict the vane surface temperature and cooling effectiveness .The SST model with γ-θtransition can better predict the heat transfer process from the leading edge to the middle string , and the results of thermal-flow coupled calculation are basically the same with the experimental results .The work of this paper provides a numerical method and experimental foundation to the following thorough research and evaluation of design effects on the cooling structure of gas turbine vane .