Self-noise prediction of a flat plate using a hybrid RANS-BEM technique
نویسندگان
چکیده
The self-noise generated by a flat plate immersed in low Mach number flow is predicted using a hybrid RANS-BEM technique. A Reynolds Averaged Navier-Stokes (RANS) simulation is performed of the turbulent flow over the flat plate. The predicted flow field data, such as mean velocity, turbulent kinetic energy and turbulent dissipation rate, is then processed using a statistical noise model and combined with a boundary element method (BEM) model of the flat plate to predict the far-field sound. The results from the hybrid RANS-BEM technique are presented for turbulent flow past a flat plate, with Reynolds number based on chord Rec=2.0×10 and Mach number M=0.044. The computed aerodynamic and acoustic results are compared with numerical and experimental results from the literature.
منابع مشابه
Self-noise prediction of a sharp-edged strut using a quasi-periodic CFD-BEM technique
The self-noise generated by a sharp-edged strut immersed in low Mach number flow is predicted using a hybrid computational fluid dynamics (CFD) boundary element method (BEM) technique. The fluctuating flow field is obtained using an incompressible CFD solver. A high-order reconstruction scheme is used to extract acoustic sources based on Lighthill’s analogy from the flow field data. Acoustic wa...
متن کاملA Hybrid RANS/LES Approach for Predicting Jet Noise
Hybrid acoustic prediction methods have an important advantage over the current Reynolds averaged Navier-Stokes (RANS) based methods in that they only involve modeling of the relatively universal subscale motion and not the configuration dependent larger scale turbulence. Unfortunately, they are unable to account for the high frequency sound generated by the turbulence in the initial mixing lay...
متن کاملHybrid RANS/LES of plane jets impinging on a flat plate at small nozzle-plate distances
A k-ω based hybrid RANS/LES (Reynolds-averaged Navier–Stokes/large eddy simulation) model is tested for simulation of plane impinging jets at various nozzle-plate distances (H/B), where H is the distance and B is the slot’s width) and various Reynolds numbers (based on the slot’s width and the velocity in the symmetry plane). The studied combinations are H/B = 2 for Re = 10 000, H/B = 4 for Re ...
متن کاملشبیهسازی عملکرد هیدرودینامیکی پیشبرندههای دریایی با کمک روش ترکیبی تئوری مومنتوم المان پره و حل معادلات متوسطگیری شده ناویر- استوکس
Hydrodynamic analysis of the marine propulsors with complex geometry such as podded drive systems, ducted propellers, and waterjet systems are more complicated than conventional propeller systems. This fact has caused the usage and development of numerical methods and techniques. The hybrid method to couple the Blade Element Momentum Theory (BEMT) with Reynolds-Averaged Navier Stokes method (RA...
متن کاملNumerical Prediction of Sheet Cavitation on Rudder and Podded Propellers Using Potential and Viscous Flow Solutions
This paper presents some recent validation results with velocity-based source BEM analysis program as applied to prediction of cavitation on rudder and podded propellers. The RANS solver is also applied to modelling of the rudder behind the propeller and the both BEM and RANS numerical predictions are compared with the experimental data. An example of prediction of cavitation on podded propelle...
متن کامل