ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Development of a Coupled VPM/CFD Model and Its Application to Aerodynamic Analysis of Rotors at Low Advance Ratios
Received date: 2013-07-23
Revised date: 2013-11-15
Online published: 2013-11-29
Supported by
National Natural Science Foundation of China (11302103); Aeronautical Science Foundation of China(20135752055)
In order to improve the computational efficiency and wake capturing resolution in rotor computational fluid dynamics (CFD) analysis, a new hybrid aerodynamic analysis model is developed through coupling viscous vortex particle method (VPM) with CFD. In this model, VPM simulates the rotor wake variation without any numerical dissipation, and CFD predicts the complicated flow phenomenon in the vicinity of a blade accurately, and provides precise vorticity sources for VPM. The integrated vorticity source method is adopted to transfer the CFD information into VPM, while the boundary correction method is employed to impose the VPM wake information on the CFD outer boundary; thus an efficient and robust coupling scheme is established. Based on the aforementioned method, the blade-vortex interaction (BVI) of "Helishape 7A rotor" at low advance ratio is investigated, and the results indicate that the VPM/CFD coupling method developed in this paper avoids numerical dissipation more effectively as compared with the full CFD method, while airload fluctuations in the BVI condition can be captured more reliably. Furthermore, the computational efficiency enhancement can be over 30% in the present analysis scenario.
XIAO Yu , XU Guohua , SHI Yongjie . Development of a Coupled VPM/CFD Model and Its Application to Aerodynamic Analysis of Rotors at Low Advance Ratios[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(6) : 1530 -1538 . DOI: 10.7527/S1000-6893.2013.0467
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