A method based on low dissipation Roe Scheme and RANS equations for predicting BVI noise of helicopter rotor in forward flight

Aim: Same as Ref. 1, a previous paper by NWPU authors, we employ RANS (Reynolds averaged Navier Stokes) equations. Different from Ref. 1, we employ the low dissipation Roe scheme. Section 2 of the full paper discusses how to select the grid so as to improve numerical calculations. Section 3 gives eqs. (2) through (5) to calculate the rotor flow field, including what is needed for predicting BVI (blade vortex interaction) aeroacoustic noise in forward flight. Section 4 gives eq. (6) and discusses the calculation of aeroacoustic noise. Section 5 gives a numerical example, whose results are given in Figs. 4 through 8. These results show preliminarily that this paper's use of low dissipation Roe scheme helps to improve the prediction precision of BVI aeroacoustic noise of helicopter rotor in forward flight.