ISSN 打印: 1948-2590
卷:卷 50, 2019 卷 49, 2018 卷 48, 2017 卷 47, 2016 卷 46, 2015 卷 45, 2014 卷 44, 2013 卷 43, 2012 卷 42, 2011 卷 41, 2010 卷 40, 2009
NUMERICAL ANALYSIS OF SINGLE-EXPANSION RAMP NOZZLE PERFORMANCE IN SUPERSONIC FLOW
Anatoliy Pavlovich Mazurov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, 140180, Russia
An analysis of results of a numerical investigation of characteristics of a single-expansion ramp nozzle (SERN) in supersonic flow is presented. Computations were conducted on the basis of the three-dimensional Reynolds-averaged Navier−Stokes equations in thin-layer approximation. A differential k−ε turbulence model which accounts for wall influence was used to calculate the turbulent viscosity. The results of the effect of a nozzle pressure ratio (NPR) and geometric parameters on the local and integral characteristics of the SERN nozzle with a profiled contour are presented. The longitudinal thrust coefficient varies non-monotonically, reaching a maximum at a certain NPR value from a considered range. The vertical component and the angle of the thrust vector have negative values and increase monotonically with increasing NPR. The nozzle impulse coefficients do not depend on the NPR. When the nozzle exit height increases the longitudinal thrust coefficient decreases or increases, reaching the maximum, in dependence on the nozzle length. The maximum of the longitudinal thrust is reached at the thrust vector angle closed by zero. The vertical thrust coefficient and the thrust vector angle decrease monotonically with increase of the nozzle exit height independence on the nozzle length. Data on the effect of the nozzle exit height and nozzle length on the coefficients of the external aerodynamic forces and moments are also presented.
键词: single-expansion ramp nozzle, viscous gas, numerical method, nozzle impulse vector, nozzle thrust vector
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