Results 171 to 180 of about 2,233 (228)
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2023
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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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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Breakthrough in the Theory of Ramjets
Russian Journal of Physical Chemistry B, 2021The paper considers the possibilities of increasing the thrust and economic characteristics of a hydrogen-fueled ramjet through the use of detonation combustion of fuel. The computational and experimental work carried out at the Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences proves that the use of continuous ...
S. M. Frolov, V. S. Ivanov
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Journal of Spacecraft and Rockets, 1982
An electrothermal ramjet configuration is examined as a possible alternative to rail guns and mass drivers for high acceleration launch missions. For a specific mission (earth escape) the idealized performance of the electrothermal ramjet, the electrothermal rocket and the electromagnetic acceleration system are compared. This comparison indicates that
P. WILBUR, C. MITCHELL, B. SHAW
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An electrothermal ramjet configuration is examined as a possible alternative to rail guns and mass drivers for high acceleration launch missions. For a specific mission (earth escape) the idealized performance of the electrothermal ramjet, the electrothermal rocket and the electromagnetic acceleration system are compared. This comparison indicates that
P. WILBUR, C. MITCHELL, B. SHAW
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2021
In the past years, many fuels were tested for ramjet applications [1, 2] Most important features in the selection of fuels for ramjet applications are: 1. specific impulse (the amount of propellant required to accelerate the missile). 2. fast fuel/air kinetics to allow high combustion efficiency and short combustors. 3. density 4. storability 5. cost 6.
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In the past years, many fuels were tested for ramjet applications [1, 2] Most important features in the selection of fuels for ramjet applications are: 1. specific impulse (the amount of propellant required to accelerate the missile). 2. fast fuel/air kinetics to allow high combustion efficiency and short combustors. 3. density 4. storability 5. cost 6.
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Goal Programming for Stable Mode Transition in Tandem Turbo-ramjet Engines [PDF]
Chinese Journal of Aeronautics, 2009 This article, in order to guarantee the stable mode transition in tandem turbo-ramjet engines, investigates the multi-objective and multi-variable goal programming algorithm. First, it introduces the structural features of the variable cycle turbo-ramjet
Tang Hailong
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2021
The turbojet and turbofan engines discussed in detail in the previous chapters are designed for high subsonic cruise speeds. The addition of an afterburner allows the turbojet engine to operate at transonic speeds for short periods of time. As shown in Fig. 1.1, for sustained supersonic flight speeds, ramjet or scramjet engines are necessary. These are
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The turbojet and turbofan engines discussed in detail in the previous chapters are designed for high subsonic cruise speeds. The addition of an afterburner allows the turbojet engine to operate at transonic speeds for short periods of time. As shown in Fig. 1.1, for sustained supersonic flight speeds, ramjet or scramjet engines are necessary. These are
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Fundamentals of Ramjet Engines
2021Ramjets are particular devices in which compression takes place by exploiting the kinetic energy of the flow. Through a system of oblique and normal shocks, the flow will be slowed down to subsonic speeds in the combustion chamber, ensuring suitable pressures for the flame anchoring.
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The atmospheric composition of Mars is approximately 95% Carbon Dioxide (CO2), and contains only about 1.6% Oxygen (O2) (Williams 2002), which is not enough to support combustion for fuels used on Earth. So for the eventual excursion and exploration of Mars, moving about will require the explorers to carry their own oxygen with them to power any ...
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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 ...
openaire +1 more source