Qiaogao Huang

TL;DR: In this paper, a propeller noise reduction method using sawtooth duct is proposed and applied for the first time to PJP, which can significantly reduce the noise generated by PJP from 10Hz to 5000Hz.

TL;DR: In this paper, a comparative study on the wake vortices generated by the hybrid RANS/LES family at the design operating condition J = 1. 0 was conducted. And the IDDES, SDES, and SBES showed the prominent resolving ability in vortice motion and evolution than the SAS and DDES.

TL;DR: In this article, a numerical analysis based on detached eddy simulations is conducted to investigate vortex instabilities in the wake of a preswirl pumpjet propulsor, and three models are established to separate the roles that the rotor, stator and duct play in the vortex structure of the pumpjet propeller.

TL;DR: In this article, the authors discussed the transient characteristic of PJP and gave a comparative analysis between steady and transient simulations using Reynolds-averaged Navier-Stokes equations (RANSE) with a focus on the transient flow field and tip clearance effect.

TL;DR: In this article, the variation laws of exciting force, pressure coefficient and the hydrodynamic coefficients differences have been studied at the different tip clearances and different oblique flow angle, and the time domain data of the pulsating pressure of PJP with cavitation conditions or without cavitation condition was presented, and then which was converted to frequency domain data by fast Fourier transform (FFT).