TY - JOUR ID - 51613 TI - Helicopter Rotor Airloads Prediction Using CFD and Flight Test Measurement in Hover Flight JO - Journal of Aerospace Science and Technology JA - JAST LA - en SN - 1735-2134 AU - Hassanzadeh, Davoud AD - Y1 - 2012 PY - 2012 VL - 9 IS - 1 SP - EP - KW - CFD KW - Dynamic mesh KW - Moving Reference Frame KW - Flight Test DO - N2 - An implicit unsteady upwind solver including a mesh motion approach was applied to simulate a helicopter including body, main rotor and tail rotor in hover flight. The discretization was based on a second order finite volume approach with fluxes given by the Roeand#39;s scheme. Discretization of Geometric Conservation Laws (GCL) was devised in such a way that the three-dimensional flows on arbitrary moving grids could be solved. The accurate geometric representation together with the flexibility required for grid displacement was achieved by using a tetrahedral grid. First, the numerical methodology was validated through experimental test data; then, our supposed helicopter configuration was utilized. At the same time, the main rotor loading measurements were done through flight tests. Two methods of moving reference frame (MRF) and viscous/inviscid Dynamic Mesh were compared resulting in robustness of Dynamic Mesh approach. Ultimately, our calculationsyieldedvalid solutions to the blade loading and wake structure. UR - https://jast.ias.ir/article_51613.html L1 - https://jast.ias.ir/article_51613_5873dfc87653d2a70828bdb7907898e7.pdf ER -