Numerical simulation on generation law of non-uniform inflow under high temperature and strong cosine rotation condition
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摘要:
对新一代一体化加力燃烧室高温强余旋的进口条件,开展了进口来流生成规律的研究。采用数值计算方法研究了非均匀流场发生装置在不同进口马赫数、余旋角和总温的非均匀流场特性。通过五孔探针的试验测量结果验证了数值模拟的准确性,采用数值模拟方法对流场不均匀指数进行了量化研究。结果表明:随着叶片扭转角度的提高,马赫数不均匀指数逐渐降低;余旋角不均匀指数随着轴向距离和进口马赫数的提高而降低;温度不均匀指数随着马赫数及主流进气温度的升高而升高。此外,发展的拟合公式能够很好地预测关键参数的变化规律,该计算结果可为流场不均匀发生装置的设计和优化提供理论和技术支持。
Abstract:For the non-uniform inlet conditions of high temperature and strong cosine rotation of the new generation integrated afterburner, the generation law of inlet flow was investigated. The non-uniform flow field characteristics of self-designed non-uniform generator under different inlet Mach numbers, cosine rotation angles and total temperature conditions were studied. The accuracy of the numerical simulation was verified by the experimental measurement results from the five-hole probe, and the numerical simulation method was used to quantify the nonuniformity index of the flow field. Results showed that the Mach number non-uniformity index decreased with the increase of blade torsion angle; the cosine rotation angle non-uniformity index decreased with the increase of axial distance and inlet Mach number; the temperature non-uniformity index increased with the increase of Mach number and mainstream inlet temperature. In addition, the fitting formula developed could well predict the variation of key parameters. At the same time, the simulation results can provide technical support for the design and optimization of non-uniformity flow generator.
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