Evaluation of the RPM Approach for the Simulation of Broadband Combustion Noise
Evaluation of the RPM Approach for the Simulation of Broadband Combustion Noise
复制标题
宽带燃烧噪声仿真 RPM 方法的评估
DOI：
10.2514/1.45535
复制
发表时间：
2010
影响因子：
4.7
通讯作者：
B. Noll
中科院分区：
文献类型：
--
作者：
B. Mühlbauer;R. Ewert;O. Kornow;B. Noll
介绍了宽带燃烧噪声模型的推导和验证。燃烧噪声的随机粒子网格方法是一种计算流体力学和计算空气声学的混合方法，它在时域上缓解了燃烧噪声源的随机重构。采用随机粒子网格方法，实现了基于雷诺平均Navier - Stokes模拟统计湍流量的非定常声源随机重构。本文建立了燃烧噪声源模型，并结合线性化的欧拉方程进行了声传播的计算。两个开放的，非预混的，湍流射流火焰（DLR-A和DLR-B），它们的燃料出口速度和各自的雷诺数不同，用于验证燃烧噪声方法的颗粒网格。将反应流计算结果和随后的声学模拟结果与实测结果进行了比较。计算得到的窄带声谱与实验数据吻合良好。
The derivation and validation of a broadband combustion noise model is presented. The random particle-mesh approach for combustion noise is a hybrid computational fluid dynamics/computational aeroacoustics method and reliesonthestochastic reconstructionofcombustionnoisesources inthe timedomain.Thestochastic reconstruction of unsteady sound sources based on statistical turbulence quantities from a reacting Reynolds-averaged Navier– Stokes simulation is realized with the random particle-mesh method. In the present paper, the modeled combustion noise sources are derived for the use in conjunction with the linearized Euler equations for the computation of the acoustic propagation. Two open, nonpremixed, turbulent jet flames (DLR-A and DLR-B), which differ in their fuel outletvelocityandtheirrespectiveReynoldsnumber,areusedforthevalidationoftheparticle-meshforcombustion noise approach. Results of the reacting flow computations and the subsequent acoustic simulations are compared with measurements. Excellent agreement is found between the computed narrow band sound spectra and the experimental data.