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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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Study of Innovative Subsonic Ramjet
2020Subsonic ramjets, due to its simplicity, nowadays could be very attractive for expendable unmanned applications. However, due to very low efficiency at low Mach numbers, practically there isn’t any important application at subsonic speed. In 50’s subsonic ramjet was used for tip jet applications. Later in 70’s there was a study of Fan Augmented Ramjet (
Davidović, Nikola +4 more
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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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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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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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