HVEPS Scramjet-Driven MHD Power Demonstration Test Results

Lineberry, J.T.; Begg, Lester L.; Castro, Joaquin H.; Litchford, Ron J.; Donohue, James M.

doi:10.2514/6.2007-3880

Cited by 24 publications

(9 citation statements)

References 1 publication

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“…The facility and the test rig have been used for a variety of direct-connect scramjet combustor test programs [1,11,12]. The facility uses combustion-heated air to supply inlet air at elevated temperatures and pressures representative of inlet conditions for a dual-mode scramjet engine.…”

Section: Experimental Approachmentioning

confidence: 99%

Dual-Mode Scramjet Flameholding Operability Measurements

Donohue

2014

Journal of Propulsion and Power

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Measurements were made in a direct-connect combustor facility designed to simulate cavity flameholding in a hydrocarbon-fueled dual-mode scramjet combustor where the presence of a shock train upstream of the flameholder has a significant impact on the inlet flow to the combustor and on flameholding limits. A mechanical throttle was installed in the downstream end of the test rig to provide the backpressurization needed to form the shock train and to decouple the operation of the flameholder from the backpressure formed by heat release and thermal choking, as it would be in a flight engine. The flameholding limits were measured by ramping inlet air temperature down until blowout was observed. The test facility used a vitiated air heater, Mach 2.2 and 3.3 inlet nozzles, a 0.65-in.-deep cavity, and ethylene and heated JP-7 fuel. A Mean blowout temperature of 1502°R was measured at the baseline condition which used a Mach 2.2 inlet, a cavity pressure of 21 psia, and ethylene fuel. The blowout temperature was found to be most sensitive to fuel injection location and fuel flow rates, and relatively insensitive to inlet Mach number and operating pressure. Video imaging showed unsteady flame structures with significant movements laterally and upstream of the flameholder.

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Section: Experimental Approachmentioning

confidence: 99%

Dual-Mode Scramjet Flameholding Operability Measurements

Donohue

2014

Journal of Propulsion and Power

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“…This system is a scramjet-driven MHD generator in which the MHD generator is directly integrated into the propulsion system. The peak scramjet-driven MHD generator performance achieved at near maximum power operating conditions was at a level of 14.8 kW of electric power output [3], [4].…”

Section: Introductionmentioning

confidence: 98%

Three-Dimensional Flow Analysis in a Faraday-Type MHD Generator

Hardianto

Sakamoto

Harada

2008

IEEE Trans. on Ind. Applicat.

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This paper studies the development and analysis of the 3-D flow fields in a Faraday-type magnetohydrodynamic (MHD) generator. A large-scale pulsed MHD generator with a Faraday channel of 4.5 m has demonstrated the maximum electric power output of 510 MW. The results of the present development and simulation are compared with the experimental results of the pulsed "Sakhalin" MHD Generator power generation system. As a result, they show close agreement with experimental ones. The development of the 3-D flow, current density distribution, and generated power are presented as well.Index Terms-Faraday channel type, induced magnetic field, MHD generator, three-dimensional analyses.

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“…The generator [2] used in the HVEPS program has a square cross-section, and an asymmetric shape with differ- Fig. 3.…”

Section: Analysis Regionmentioning

confidence: 99%

“…In addition, the fluid readily becomes nonuniform due to secondary flow resulting from the corners in a square crosssection, but it does not readily become nonuniform in a circular cross-section because the circumference is uniform. Thus, in the research reported here we designed new generator channels with a square cross-section and a circular cross-section based on the DCW-MHD generator [2] with a square cross-section used in the HVEPS program experiments, then evaluated the effects of the cross-sectional shape on the electromagnetic fluid behavior and the power generation performance by three-dimensional (3D) numerical analysis. The objective was to use the results to provide suggestions for experiments on future scramjet-driven MHD generators.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, a method of generating power at the same time as propulsion by using an MHD generator with high power density installed in the downstream part of the engine and with no moving parts has been proposed [1]. In order to evaluate the viability of a scramjet-driven MHD generator in this system, verification experiments [2] have been performed in the Hypersonic Electric Power System (HVEPS) program [1,3]. Figure 1 shows a diagram of the scramjet enginedriven MHD power generation system.…”

Section: Introductionmentioning

confidence: 99%

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Performance Comparison of Scramjet‐Driven Experimental DCW‐MHD Generators with Different Cross‐Sections

Niwa

Takahashi

Fujino

et al. 2014

Electrical Engineering Japan

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SUMMARYThe purpose of this study is to examine the influence of the shape of the cross-section of a scramjet engine-driven experimental diagonal conducting wall (DCW)-MHD generator on generator performance by three-dimensional numerical analyses. We have designed MHD generators with symmetric square and circular cross-sections, based on an experimental MHD generator with an asymmetric square cross-section. Under the optimum load conditions, the electric power output reaches 26.6 kW for the asymmetric square cross-section, 24.6 kW for the symmetric square cross-section, and 22.4 kW for the circular cross-section. The highest output is obtained for the experimental generator with the asymmetric square cross-section. The difference in the electric power output is induced by the difference of flow velocity and boundary layer thickness. For the generator with the asymmetric square cross-section, the average flow velocity is highest and the boundary layer is thinnest. The compression wave is generated with dependence on the channel shape. The difference in the flow velocity and boundary layer thickness is induced by the superposition of the compression wave. C⃝ 2014 Wiley Periodicals, Inc. Electr Eng Jpn, 187(2): 9-16, 2014; Published online in Wiley Online Library (wileyonlinelibrary.com).

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HVEPS Scramjet-Driven MHD Power Demonstration Test Results

Cited by 24 publications

References 1 publication

Dual-Mode Scramjet Flameholding Operability Measurements

Dual-Mode Scramjet Flameholding Operability Measurements

Three-Dimensional Flow Analysis in a Faraday-Type MHD Generator

Performance Comparison of Scramjet‐Driven Experimental DCW‐MHD Generators with Different Cross‐Sections

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