【摘要】 应用弱可压缩流体控制方程和大涡模拟湍流模型,采用MacCormack的预估 校正方法对射流泵内流场(二维)进行了数值模拟。经过对不同射流泵运行工况的计算,都取得了令人满意的预报结果。研究表明,弱可压缩流动方程能代表低马赫数时的真实流动现象,且方程具有双曲性质易于数值求解。数值模拟结果可为改进射流泵性能提供依据。更多还原

【Abstract】 The thesis represents a numerical model which simulates the real inner flow(two dimensions) of a jet pump by applying weakly compressible flow equations, large eddy simulation turbulence model, and MacCormack predictor?correct method. The numerical calculation under the different working conditions shows that the results are greatly satisfactory, and that weakly compressible fluid equations can simulate the low Mach number flow and make it easy to calculate. Numerical calculation results can offer basis to improve jet pump performance.更多还原