NDLI: Mechanism of self-oscillations in a supersonic jet impact onto an obstacle 1. Obstacle with a spike

Content Provider	Springer Nature Link
Author	Kiselev, S. P. Kiselev, V. P. Zaikovskii, V. N.
Copyright Year	2014
Abstract	Results of numerical simulations and experimental investigations of self-oscillations arising in the case of impingement of an overexpanded or underexpanded jet onto an obstacle with a spike are reported. The mechanisms of the emergence and maintaining of self-oscillations for overexpanded and underexpanded jets are elucidated. It is demonstrated that self-oscillations are caused by disturbances in a supersonic jet, which induce mass transfer between the supersonic flow and the region between the shock wave and the obstacle. The feedback is ensured by acoustic waves generated by the radial jet on the obstacle. These waves propagate in the gas surrounding the jet, impinge onto the nozzle exit, and initiate disturbances of the supersonic jet parameters. In the overexpanded jet, these disturbances penetrate into the jet core, where they are amplified in oblique shock waves.
Starting Page	593
Ending Page	601
Page Count	9
File Format	PDF
ISSN	00218944
Journal	Journal of Applied Mechanics and Technical Physics
Volume Number	55
Issue Number	4
e-ISSN	15738620
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-08-06
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	supersonic jet obstacle with a spike self-oscillations Mechanics Fluid- and Aerodynamics Classical Continuum Physics Applications of Mathematics Mathematical Modeling and Industrial Mathematics Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Condensed Matter Physics Mechanical Engineering

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