Suppression of Restricted Shock Separation in Overexpanded Rocket Nozzles
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 2005 Restricted shock separation (RSS) occurs in new bell type rocket nozzles such as the compressed truncated perfect nozzle and the thrust optimized nozzle. RSS may cause two serious problems. The first is the large side load on the nozzle and the second is the damage on the regenerative cooling tubes.
Yoshinobu Tsujimoto +4 more
openaire +4 more sources
Suppressing Restricted Shock Separation in a Subscale Rocket Nozzle Using Contour Geometry
Journal of Propulsion and Power, 2016 The use of a thrust-optimized contour (TOC) for the supersonic nozzle in a rocket engine will inherently maximize the propulsive efficiency and payload capacity of the entire launch system. A TOC can be approximated using a skewed parabola, commonly referred to as a thrust-optimized parabola (TOP), and the TOP contour can be manipulated to avoid ...
Schomberg, K. +3 more
openaire +4 more sources
Comparative Study of OpenFOAM Solvers on Separation Pattern and Separation Pattern Transition in Overexpanded Single Expansion Ramp Nozzle [PDF]
Journal of Applied Fluid Mechanics, 2023 Flow separation in overexpanded single expansion ramp nozzles (SERN) involves complex phenomena, such as shock waves, expansion waves, turbulent boundary layers, and shear layers.
T. Yu +4 more
doaj +1 more source
Investigation of Shock Wave Oscillation Suppression by Overflow in the Supersonic Inlet
Energies, 2022 With a focus on the shock oscillation phenomenon of a supersonic inlet at a high Mach number, the influence of isolator overflow on shock oscillation is studied in this paper.
Feichao Cai, Guanhong Huang, Xiaowei Liu
doaj +1 more source
Effect of Nozzle Contour on Flow Separation in Overexpanded Rocket Nozzles
Journal of Fluid Science and Technology, 2007 In the present paper, parametric numerical analyses of the separated transonic flows in overexpanded rocket nozzles are conducted. Several types of nozzles are examined numerically to clarify the detailed mechanisms of the occurrence of restricted shock ...
Koichi YONEZAWA +4 more
doaj +1 more source
A Study of an Asymmetric Flow in an Overexpanded Rocket Nozzle
Journal of Fluid Science and Technology, 2007 This paper presents an investigation of the unsteady three-dimensional flow in an overexpanded rocket nozzle during a shutdown transient. Experimental and numerical investigations were carried out.
Koichi YONEZAWA +4 more
doaj +1 more source
Experimental Flow Investigation of a Truncated Ideal Contour Nozzle [PDF]
, 2006 Various tests showed a significant side load peak for low nozzle pressure ratios during engine start-up and shut down phase. DLR Lampoldshausen carried out tests to examine the flow field in a truncated ideal contour nozzle for low NPR.
Stark, Ralf, Wagner, Bernd
core +1 more source
Constraining Relativistic Bow Shock Properties in Rotation-Powered Millisecond Pulsar Binaries [PDF]
, 2017 Multiwavelength followup of unidentified Fermi sources has vastly expanded the number of known galactic-field "black widow" and "redback" millisecond pulsar binaries. Focusing on their rotation-powered state, we interpret the radio to X-ray phenomenology
Baring, Matthew G. +4 more
core +3 more sources
Time variation in the dynamics of worker flows:evidence from North America and Europe [PDF]
, 2014 Vector autoregressive methods have been used to model the interrelationships between job vacancy rates, job separation rates and job-finding rates using tools such as impulse response analysis.
Blanchard +28 more
core +2 more sources
First detection of phase-dependent colliding wind X-ray emission outside the Milky Way [PDF]
, 2007 After having reported the detection of X-rays emitted by the peculiar system HD5980, we assess here the origin of this high-energy emission from additional X-ray observations obtained with XMM-Newton.
Anthony F. J. Moffat +7 more
core +3 more sources