Helicopter Rotor Noise Prediction Using ONERA and DLR Euler/ Kirchhoff Methods

Euler/Kirchhoff methods have been developed at ONERA and DLR to predict the High Speed Impulsive (HSI) noise generated by helicopter rotors in hover or in forward flight. The main purpose of this common work is to validate the aeroacoustic computations with delocalized test cases. In hover, the aerodynamic and acoustic results obtained by each partner are in good agreement with experiment. In forward flight, a first set of computations is performed with three different sized "classical" grids. For both partners, the pressure coefficients on the blade are in better correlation with experiment when the grid is refined. However, the capture of the shock waves propagation beyond the blade is not accurate enough to perform satisfactory Kirchhoff computations. The minimum pressure peak and the recompression slope of the acoustic pressure signatures are not accurately predicted, whatever the grid refinement of the Kirchhoff surface locations may be. An

Numerical simulation of unsteady internal flows using dual time stepping method

Communication to : 1st international conference on CFD, Kyoto (Japan), July 10-14, 2000SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.2000 n.197 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Calculations of multibladed rotors in hover using 3D Euler methods of DLR and ONERA

Communication to : Twenty first European Rotorcraft Forum, Saint-Petersburg (Russia), August 30 - September 1, 1995Available at INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1995 n.131 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueSIGLEFRFranc

Prediction of HSI noise using a coupled Euler/Kirchhoff method for a helicopter in hoverflight

Communication to : 22nd European rotorcraft forum, Brighton (UK), september 17-19, 1996SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1996 n.62 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Computation of weakly multi-ionized gases for atmospheric entry using an extended Roe scheme

Communication to : ECCOMAS, Jyvaskyla (Finlande), 24-28 Juillet 2004SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.2004 n.155 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Numerical simulation of buffeting over airfoil using dual time stepping method

Communication to : ECCOMAS 2000, Barcelona (Spain), September 11-14, 2000SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.2000 n.231 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Helicopter rotor noise prediction using ONERA and DLR Euler / Kirchhoff methods

Communication to : AHS technical specialist's meeting for rotorcraft acoustics and aerodynamics, Williamsburg (USA), October 28-30, 1997Available from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1997 n.192 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueSIGLEFRFranc

Progress in solving coupled aerothermodynamics issues faced by space vehicles

Communication to : ESA 5th European symposium on aerothermodynamics for space vehicles, Cologne (Germany), 8-11 novembre 2004SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.2005 n.2 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Predictions of high-speed impulsive rotor noise using Euler/Kirchhoff methods of Onera and NAL

Communication to : HELI JAPAN 98, Gifu (Japan), April 21-23, 1998Available from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1998 n.46 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueSIGLEFRFranc

A comparative study of three methodologies for modeling dynamic stall

Communication to : 28th European rotorcraft forum, Bristol (Grande Bretagne), September 17-20, 2002SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.2002 n.184 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc