Multi-Parameter Optimization of Automotive Rear View Mirror Region for Reducing Aerodynamic Noise

2018 ◽  
Vol 66 (1) ◽  
pp. 11-26
Author(s):  
Qiliang Li ◽  
Liyuan Zhong ◽  
Yigang Wang ◽  
Zhigang Yang ◽  
Mohammad Mehdi Rashidi
Keyword(s):  
Parameter Optimization ◽  
Aerodynamic Noise ◽  
Rear View Mirror ◽  
Mirror Region

scholarly journals Prediction and Aerodynamic Analysis of Interior Noise and Wind Drag Generated by the Outside Rear-View Mirror for Commercial Vehicles

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Binfei Hu ◽  
Zengjun Lu ◽  
Qiming Cui ◽  
Rongjiang Tang ◽  
Zhe Feng ◽  
...  
Keyword(s):  
Flow Field ◽  
Window Glass ◽  
A Priori ◽  
Glass Structure ◽  
Simulation Method ◽  
Interior Noise ◽  
Aerodynamic Noise ◽  
Commercial Vehicles ◽  
Rear View Mirror ◽  
Aerodynamic Pressure

The outside rear-view mirror (OSRVM) is installed on the vehicle’s surface, which causes unwanted aerodynamic noise and wind drag during driving. It is important to use simulation methods to predict the performance of aerodynamic noise and wind drag of commercial vehicles due to the OSRVM. Considering the wind drag of the OSRVM, a combinational simulation strategy is employed to calculate external flow and interior acoustic fields of commercial vehicles, respectively. The flow field is computed a priori with an incompressible flow solver. The acoustic field was then computed based on the information extracted from the CFD solver. To obtain the interior noise level at the driver’s ears, a vibroacoustic model is used to calculate the response of the window glass structure and interior cavities, where the unsteady aerodynamic pressure loading on the two side windows’ surface is treated as the acoustic source field. The paper provides flow field and acoustic simulations for three OSRVM configuration models. The results are compared to data obtained in road sliding test measurement on the commercial vehicle. The accuracy of the hybrid simulation method is proved, and the comparative analyses verify that the OSRVM B model dramatically reduces the interior noise and wind drag of commercial vehicles.

scholarly journals Direct Numerical Prediction of Aerodynamic Noise Emitted from a Generic Automobile Rear-View Mirror

2012 ◽  
Vol 7 (3) ◽  
pp. 290-303 ◽  
Author(s):  
Katsunori DOI ◽  
Masaya MIYOSHI ◽  
Naoki HAMAMOTO ◽  
Yoshiaki NAKAMURA
Keyword(s):  
Numerical Prediction ◽  
Aerodynamic Noise ◽  
Rear View Mirror

Experimental and numerical studies on aerodynamic noise of automotive rear view mirror

2011 ◽  
Vol 59 (6) ◽  
pp. 613 ◽  
Author(s):  
Qiliang Li ◽  
Zhigang Yang ◽  
Yigang Wang ◽  
Yinzhi He
Keyword(s):  
Aerodynamic Noise ◽  
Rear View Mirror ◽  
Numerical Studies

Оптимизация параметров машины для уборки лука-репки с укладкой в валок

2018 ◽  
Author(s):  
I.I. Irkov ◽  
V.G. Selivanov ◽  
N.V. Romanovskiy
Keyword(s):  
Soil Moisture ◽  
Operating Procedure ◽  
Parameter Optimization ◽  
Stable Operating

Изложены результаты оптимизации параметров машины для уборки лука-репки с укладкой в валок. Установлено, что покрытие фторопластом подкапывающих ножей, выполненных по криволинейной поверхности, и опорного катка обеспечивает стабильный технологический процесс машины при влажности почвы до 26%.The results of parameter optimization for onion harvesting machine with swath emplacement are stated. Teflon (fluoroplastic) coating of curvilinear digging shares and track roller provides stable operating procedure up to 26% soil moisture.

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