Open AccessStudy on the Aerodynamic Characteristics of Top-Mounted Inlet with Different Lip Angles
Author(s) -
Lianghua Xiao,
Changjie Ge,
Yinhui Shang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1985/1/012053
Subject(s) - inlet , computational fluid dynamics , aerodynamics , mach number , mechanics , distortion (music) , angle of attack , vortex , materials science , acoustics , optics , geology , marine engineering , engineering , mechanical engineering , physics , amplifier , optoelectronics , cmos
The stealthy performance is an important factor to be considered in the design of the modern UAV, and the inlet is the strong RCS scattering source, which needs to be paid more attention. The inlet with lip angle is beneficial to the stealth performance, but unfavorable to the aerodynamic characteristics of the inlet. In this paper, three inlets with different lip angles are studied, and the characteristics of the inlets are obtained by using CFD and experimental methods. Results indicate: 1) data obtained by CFD well predicts the vortex in the inlet, and it’s very close to the experimental value, which shows that CFD method can be used for analysis; 2) the lip angle has a great influence on the characteristics of the inlet under ground running, and the circumferential distortion index of the inlet increases rapidly with the increase of the lip angle; 3) the effects of the lip angle on the characteristics of the inlet can be ignored under the condition of the high incoming Mach number.