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首页> 外文会议>International symposium on jet propulsion and power engineering >Numerical Simulations on the Flow Characteristics and Temperature Drop of an Aerodynamic Pre-swirl Hole
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Numerical Simulations on the Flow Characteristics and Temperature Drop of an Aerodynamic Pre-swirl Hole

机译：气动预旋孔流动特性和温度下降的数值模拟

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摘要

A simple drilled hole and an aerodynamic hole with pre-swirl angle of 20 °were numerically simulated and experimentally measured. The computational models include standalone model which contains only the inlet cavity, pre-swirl hole and outlet cavity, and system model which contains rotating parts on the basis of standalone model. The investigated parameters are: velocity contour, outlet velocity, outlet flow angle, discharge coefficient and pre-swirl effectiveness. The discharge coefficient of standalone model was measured. Results show that the measured and calculated discharge coefficient coincide well, and the discharge coefficient, pre-swirl effectiveness and temperature drop of the aerodynamic hole are markedly increased by more than 20% comparing with that of the simple drilled hole. Data also reveals that the discharge coefficient and pre-swirl effectiveness obtained from the standalone model are very close to that from the system model, and the temperature drop predicted via the pre-swirl effectiveness of standalone model can reveal the temperature drop characteristics of pre-swirl system indirectly.
机译：对一个简单的钻孔和一个预旋角为20°的空气动力学孔进行了数值模拟和实验测量。计算模型包括仅包含入口腔，预旋孔和出口腔的独立模型，以及在独立模型的基础上包含旋转零件的系统模型。研究的参数为：速度轮廓，出口速度，出口流角，排放系数和预旋流效率。测量了独立模型的排放系数。结果表明，测得的排放系数与计算出的排放系数吻合得很好，与简单钻孔相比，空气动力学孔的排放系数，预旋效率和温降显着提高了20％以上。数据还显示，从独立模型获得的排放系数和预旋流效率与从系统模型获得的排放系数和预旋流效率非常接近，并且通过独立模型的预旋流效率预测的温降可以揭示预燃系统的温降特性。间接涡旋系统。

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