Results 181 to 190 of about 6,709 (233)
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Unsteadiness in a ramjet model
Combustion, Explosion, and Shock Waves, 2013The process of combustion of a hydrocarbon fuel in a pulsed mode is discussed on the basis of results of ramjet testing in an external flow modeling a Mach 5 flight.
V. M. Levin +4 more
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54th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law, 2003
In 1980, the author first presented the idea of a quantum interstellar ramjet that could exploit the quantum electromagnetic zero-point energies of the vacuum for propulsion for relativistic spaceflight to the stars. This paper briefly reviews this idea and updates it with subsequent work by others – as to the nature of the quantum vacuum and the ...
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In 1980, the author first presented the idea of a quantum interstellar ramjet that could exploit the quantum electromagnetic zero-point energies of the vacuum for propulsion for relativistic spaceflight to the stars. This paper briefly reviews this idea and updates it with subsequent work by others – as to the nature of the quantum vacuum and the ...
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The theory, characteristics, construction, and design of subsonic and supersonic ramjet engines are discussed in this chapter. The information is based on domestic and foreign sources that have been published as books and magazine articles. "The theory of the fundamental engine components, including diffusers, combustion chambers, and The operation of ...
S. P. Gairola +3 more
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S. P. Gairola +3 more
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Ramjet Engine Testing and Simulation Techniques
Journal of Spacecraft and Rockets, 1978Simulation of flow conditions within the operating regime of ramjet engines requires unique ground test capabilities. The blowdown facility is an economical method of meeting the high air mass flow and pressure ratio requirements. Vitiated air heaters provide a flexible and cost-effective method of simulating trajectory temperature variation.
L. DUNSWORTH, G. REED
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Unsteady gas dynamic processes in Ramjets
Fluid Dynamics, 1993The characteristics of the gas dynamic wave process taking place in a ramjet duct when the combustion chamber is started up or the fuel supply regime is switched have been investigated.
Egorushkin, S. A., Slobodkina, F. A.
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2021
Ramjet performance is calculated by means of the well-acknowledged Bryton cycle. The real Bryton cycle accounting for friction losses, pressure recovery, combustion efficiency and the thermal chocking, has been analyzed to establish the greatest operative conditions for the ramjet engine.
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Ramjet performance is calculated by means of the well-acknowledged Bryton cycle. The real Bryton cycle accounting for friction losses, pressure recovery, combustion efficiency and the thermal chocking, has been analyzed to establish the greatest operative conditions for the ramjet engine.
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SIMILARITY AND SCALE EFFECT IN RAMJET COMBUSTORS
Symposium (International) on Combustion, 1963In view of the successful application of “pressure scaling” to gas turbine and reheat combustors, there is interest in using the technique for ramjets. However, as the fuel distribution process in typical ramjet combustors was suspected of causing scaling difficulties, the present work set out to determine the value of pressure scaling under these ...
D.G. Stewart, G.C. Quigg
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Thermophysics and Aeromechanics, 2009
An exergy analysis of possible regimes of energy supply to the air flow in the ramjet duct is carried out. A condition for the supply of a given heat amount to supersonic flow and a condition of the passage across the sound velocity are obtained for a duct with variable cross-sectional area.
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An exergy analysis of possible regimes of energy supply to the air flow in the ramjet duct is carried out. A condition for the supply of a given heat amount to supersonic flow and a condition of the passage across the sound velocity are obtained for a duct with variable cross-sectional area.
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Unified Analysis of Internal Flowfield in an Integrated Rocket Ramjet Engine. II: Ramjet Sustainer
Journal of Aerospace Engineering, 2014AbstractThe flow and combustion dynamics in the ramjet sustainer of an integrated rocket-ramjet (IRR) engine are investigated systematically. The physical model includes the entire engine flowpath, from the freestream in front of the inlet to the exit of the exhaust nozzle.
Hong-Gye Sung, Vigor Yang
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Ramjets: Airframe integration [PDF]
, 2010 These notes deal with the integration of a (sc)ramjet engine in either an axisymmetric or a waverider type of cruise missile configuration. The integration aspects relate to the integration of the external and internal flow paths in geometrical configurations that are being considered worldwide.
Moerel, J.L., Halswijk, W.
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