|Table of Contents|

Numerical analysis on effect of engine jet on the aircraft drag (PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2023年03期
Page:
105-114
Research Field:
目次
Publishing date:

Info

Title:
Numerical analysis on effect of engine jet on the aircraft drag
Author(s):
HAN Shanshan;  FENG Xiaoqiang;  LI Hongjun;  QUAN Jingge;  LIU Chang'an
(Xi'an Aerospace Propulsion Institute, Xi'an 710100, China)
Keywords:
base jet;  dual nozzle;  sub-tran-supersonic;  flow interaction;  drag increase
PACS:
V211
DOI:
-
Abstract:
The base drag plays an important role in the aircraft drag, so it is very important to predict the base drag accurately for the flight performance evaluation of the aircraft. The base jet has an obvious effect on the base drag of the aircraft. The flow simulation method based on the Reynolds-averaged Navier-Stokes equation was applied in the research on the interaction between the engine jet with the external flow. The effect of the engine jet on the drag of the aircraft was mainly analyzed. The engine with dual nozzle to achieve two kinds of trust was mounted on the body of the aircraft in the paper. The engine works in the corresponding thrust under different flight condition. The flow without jet, the flow with single nozzle jet and the flow with the dual nozzle jet were simulated in the condition of subsonic, transonic and supersonic to analyze the change of the drag. The results show that on one hand, at different Mach number, the effect of the engine jet on the base drag is basically the same. While on the another hand, compared to the flow without the jet, when the engine works with the single nozzle or the dual nozzle, the drag of the aircraft always increases due to the obvious jet injection effect.

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