Abstract
A hybrid numerical simulation method was established by combining the Spalart-Allmaras (SA) turbulence model and detached eddy simulation (DES). Numerical simulations were carried out to model cold and hot spray conditions of a nozzle without considering the internal flow of an engine to determine jet conditions. Analysis results show that the calculated hot spray results more in line with the reality. The jet effect of a typical aircraft engine was simulated numerically to determine the distance influenced by the jet blast from a departing aircraft engine.
Highlights
IntroductionLiu et al [28] used a mixed unstructured grid and an SST turbulence model to simulate a jet engine with the detached eddy simulation (DES) method and compared it with experimental results
To address the strains created by an increasing number of flights and the lack of airport support capability, major airports in China have been reconstructed and expanded
Gong et al [30] proposed an improved delay separation vortex simulation (IDDES) method based on the SST model for a high-precision simulation of the jet engine effect and conducted a numerical study of the dynamic jet effect through a Reynolds-averaged Navier–Stokes (RANS)/ LES hybrid method. eir results showed that the velocity distribution in a jet blast can be predicted better [31, 32]
Summary
Liu et al [28] used a mixed unstructured grid and an SST turbulence model to simulate a jet engine with the DES method and compared it with experimental results. Gong et al [30] proposed an improved delay separation vortex simulation (IDDES) method based on the SST model for a high-precision simulation of the jet engine effect and conducted a numerical study of the dynamic jet effect through a RANS/ LES hybrid method. Two different jet states from a Boeing aircraft nozzle are calculated, and the calculated state, which is more consistent with the working conditions of the engine, is determined On this basis, the influence distance of a typical jet blast is studied to provide the necessary theoretical and technical support for the implementation of a taxibehind mode. It provides a reference for the study of engine jet by the DES numerical simulation method
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