Results 181 to 190 of about 9,113 (233)
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Radiative heating in scramjet combustors
31st Thermophysics Conference, 1996Currently, there is considerable interest in scramjet engines for hypersonic aircraft and missiles. This paper presents preliminary calculations of the radiative heating of the walls of scramjet combustion chambers. The analysis assumes isothermal, constant property ow elds that are representative of actual combustor ow elds.
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Comparison of Scramjet and Shcramjet Propulsion for an Hypersonic Waverider Configuration
44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2008Ramjet propulsion is often proposed for airbreathing applications with speeds higher than Mach 3. However, for speeds higher than Mach 5, the performance of a ramjet drops significantly and the scramjet is the preferred option. The shockinduced combustion ramjet, or shcramjet, is also an interesting alternative at higher flight speeds.
Couture, D. +5 more
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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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24th AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2004
Introduction: This describes the telemetry (TM) antenna development for the SCRAMJET Projectile tests. The antenna development was part of the Government’s Hardened Subminiature Telemetry and Sensor System (HSTSS) program’s support to Allied Aerospace, GASL Division.
Marv Ryken, R. Davis
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Introduction: This describes the telemetry (TM) antenna development for the SCRAMJET Projectile tests. The antenna development was part of the Government’s Hardened Subminiature Telemetry and Sensor System (HSTSS) program’s support to Allied Aerospace, GASL Division.
Marv Ryken, R. Davis
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Wave processes in scramjet thrust generation
Combustion and Flame, 1988The investigation explores the steady, supersonic expansion and compression wave processes involved in generating thrust from a combustion jet in a two-dimensional scramjet. Two types of thrust generating wave are produced by the jet. The first is the injection compression waves associated with injection and combustion of the fuel, and the second is ...
Stalker, RJ, Morgan, RG, Netterfield, MP
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Numerical study of a scramjet engine flow field
19th Aerospace Sciences Meeting, 1981A computer program has been developed to analyze the turbulent reacting flow field in a two-dimensional scramjet engine configuration. The program numerically solves the full two-dimensional Navier-Stokes and species equations in the engine inlet and combustor, allowing consideration of flow separation and possible inlet-combustor interactions.
Drummond, J. Philip +1 more
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Effects of Oxygen Enrichment on Scramjet Performance
AIAA Journal, 2013This investigation quantifies the beneficial effects of oxygen enrichment on the combustion efficiency and specific thrust of a simplified planar scramjet engine fueled with gaseous hydrogen. Numerical modeling was used to examine the influence of fuel equivalence ratio and enrichment percentage.
Petty, David J. +3 more
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Periodic Optimal Hypersonic Scramjet Cruise
Optimal Control Applications and Methods, 1984AbstractFuel‐optimal periodic cruise paths are determined numerically for a hypersonic vehicle with more realistic aerodynamic and scramjet engine models than used in previous work. A modification of the shooting method, called the minimizing‐boundary‐condition method, is used to increase the region of convergence of the solution to the two‐point ...
Chuang, Chien-Hsiung, Speyer, Jason L.
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Scramjets for Reusable Launch of Small Satellites
20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015The global economic environment, combined with the rapid pace of technology advancement is placing importance on reducing the cost and increasing the responsiveness of access to space systems. Based on decades of practical experience with rocket-only launch vehicles, current technology is operated close to theoretical limits.
Preller, Dawid, Smart, Michael K.
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Optimization of Two-Dimensional Scramjet Inlets
Journal of Aircraft, 1999The classical optimization of two-dimensional supersonic inlets for maximum total pressure recovery is extended to two-dimensional scramjet inlets. The result that optimal supersonic inlets have shock waves of equal strength is often applied to scramjets, However the typical flow turning constraint required for scramjets, along with the lack of a ...
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