Open AccessNumerical Investigation of the Inlet with Different Lip-plane Shapes under Ground Running
Author(s) -
Changjie Ge,
Xiao Hu,
Yinhui Shang,
Lianghua Xiao
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 - 10.1088/1742-6596/1985/1/012028
Subject(s) - inlet , vortex , mechanics , duct (anatomy) , thrust , distortion (music) , materials science , total pressure , plane (geometry) , geology , structural engineering , acoustics , physics , aerospace engineering , geometry , engineering , mathematics , medicine , amplifier , optoelectronics , cmos , geomorphology , pathology
The inlet of the UAV is usually designed on the back of the aircraft in order to give consideration to the overall arrangement and stealth performance. Under ground running, there are often severe vortices in the duct of the backpack inlet, which leads to low total pressure recovery and large circumferential distortion index at the AIP. Different shapes of the lip-plane produce different vortices, which have great impact on circumferential distortion index at the AIP. In this paper, the characteristics of three different lip-plane shapes were studied under the ground running. Results indicate: (1) W-shaped inlet has lowest circumferential distortion index and the flow distribution is the most uniform at the AIP; (2) Λ-shaped inlet has the weakest of the vortex strength and the largest total pressure recovery, which means the thrust loss caused by the inlet is smallest; (3) V-shaped inlet has the strongest vortex strength and the lowest total pressure recovery.