用RNGk-ε模型计算内燃机缸内湍流流动

Application of RNG k-ε Model to the In-Cylinder Turbulent Flow in ICE

应用快速畸变假设对 RNG k-ε湍流模型进行压缩性修正后 ,将其应用于内燃机缸内湍流流动的数值模拟 ,计算采用任意拉格朗日 -欧拉法。给出了用 RNG k-ε模型算得的结果 ,并与标准的 k-ε模型算得的结果和实验结果进行了对比。结果表明 ,用 RNG k-ε湍流模型算得的结果比 k-ε模型算得的结果有所改进 。

Under the assumption of rapid distortion the RNG k ε turbulence model was modified to include the compressibility effects and applied to in cylinder turbulent flows in internal combustion engines.The computations were based on the arbitrary Lagrangian Eulerian method.Numerical results were given and compared with experimental results.It is shown that the RNG k ε turbulence model is better than the traditional one and is suitable for the internal combustion engine flows.