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基于流固热耦合理论,采用标准k-ε湍流模型,通过对Navier-Stokes方程和三维热传导方程联合进行求解。对偏心距引射喷管与传统引射喷管进行了数值模拟,得到了较为精确的流场特性,为后期偏心距引射喷管的红外特性计算提供必要的依据。在数值计算中对于固体域、流体域均采用结构化网格,并在两者边界面上采用耦合方法。对偏心距引射喷管的抽吸特性、推力特性以及最佳偏心距等喷管性能分别进行了深入研究,得出了偏心距引射喷管较传统引射喷管具有泵抽能力强的结论。得到了抽吸能力最强且推力损失较小的最佳偏心距引射喷管,其工程应用前景广泛。
Based on the fluid-solid coupling theory, a standard k-ε turbulence model is used to solve the Navier-Stokes equation and the three-dimensional heat conduction equation. The eccentric injection nozzle and the traditional injection nozzle were numerically simulated, and the more accurate flow field characteristics were obtained, which provided the necessary basis for calculating the infrared characteristic of the injection nozzle after the eccentricity. In the numerical calculation, for the solid domain, the fluid grid adopts a structured grid, and a coupling method is adopted on the boundary between the two. In-depth study on the nozzle performance of the eccentric nozzle, such as the suction characteristics, the thrust characteristics and the optimum eccentricity were carried out. The results show that the eccentricity injection nozzle has more pumping ability than the traditional nozzle in conclusion. Get the best suction capacity and thrust loss of the best eccentric distance nozzle, its engineering application prospects.