Journal ArticleDOI
Effect of Geometric Configurations on the Starting Transients in Vacuum Ejector
R. Arun Kumar,G. Rajesh +1 more
TLDR
In this article, the starting transients in vacuum ejector and its dependence on various geometric configurations were investigated, and various geometric parameters were the ratio of diffuser to priors were investigated.Abstract:
This paper investigates the starting transients in vacuum ejector and its dependence on various geometric configurations. Various geometric parameters investigated were the ratio of diffuser to pri...read more
Citations
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Journal ArticleDOI
Starting transients in second throat vacuum ejectors for high altitude testing facilities
Ghanshyam Bharate,Arun Kumar R +1 more
TL;DR: In this article, the authors investigated the process of vacuum generation in a second throat vacuum ejector system employed for the high altitude testing of rocket motors and found that the various stages of evacuation are closely linked to the internal shock wave movement in the supersonic nozzle.
Journal ArticleDOI
Transient characteristics of a typical vacuum ejector—An experimental study
TL;DR: In this article , the authors investigate the characteristics of a typical vacuum ejector's starting transient, steady-state, and shut-down transient, using time-resolved Schlieren images and oil flow visualization.
Journal ArticleDOI
Starting transient analysis of second throat exhaust diffuser in high-altitude test of a thrust optimized parabolic nozzle
TL;DR: In this paper , the authors present a combined numerical and experimental investigation of the starting process of a second throat diffuser during ground testing of a thrust-optimized parabolic (TOP).
References
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Journal ArticleDOI
Flow transients in un-started and started modes of vacuum ejector operation
R. Arun Kumar,G. Rajesh +1 more
TL;DR: In this paper, an experimental study has been carried out to investigate the nature of transients in vacuum ejector flows during start-up and the dynamics in flow characteristics, and the results show that the secondary stream induction progresses with non-uniform rates with the ramping primary jet pressure during startup.
Journal ArticleDOI
Starting Transients in Vacuum Ejector-Diffuser System
TL;DR: In this paper, an inertial effect is discovered due to the recirculation zone moving forward and backward during the transients, and subsequently, the pressure in the secondary chamber oscillates.
ReportDOI
Some reynolds number effects on the performance of ejectors without induced flow
R C Bauer,R C German +1 more
TL;DR: In this paper, the variation of minimum cell pressure ratio with nozzle total pressure level for various ejector configurations having axially symmetric nozzles located on the centerline of cylindrical ducts was presented.
Journal ArticleDOI
Scale model testing of 90 deg supersonic turn ejector systems for altitude simulation
TL;DR: In this paper, an experimental investigation was conducted to determine the operational and heattransfer characteristics of rocket engine altitude-simulation ejector systems with 90° supersonic turns.