Nosetip injection for erosion protection

Siegelman, D.; Pallone, A.

doi:10.2514/6.1976-468

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Fig 4 Post-test Photograph Of the Steel Models1

Ground Tests Experimental Apparatus (Series 1)1

Configuration Selection1

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1978

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(3 citation statements)

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“…Unfortunately, the entire particle flow segment of this test was performed in an off-design condition. 6 Due to experimental difficulties, further testing with krypton gas was not pursued.…”

Section: Fig 4 Post-test Photograph Of the Steel Modelsmentioning

confidence: 99%

“…Various internal, external and photographic instrumentation was provided in support of the testing. 6 As shown in Fig. 4, model geometry consisted of a 0.5-in.-diam flat-faced 30° cone configuration.…”

Section: Ground Tests Experimental Apparatus (Series 1)mentioning

confidence: 99%

“…6, it was determined that a flat-faced configuration utilizing distributed sonic injection of a cold, high-molecular-weight gas provides a minimum weight/volume design. Briefly, this results because the injection layer density/thickness product is fixed by the particle slowdown requirement, while the mass flow passing radially out through the layer varies with the local radial gas velocity.…”

Section: Configuration Selectionmentioning

confidence: 99%

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Cold Gas Injection for Erosion Protection

Siegelman

Pallone

1978

Journal of Spacecraft and Rockets

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A method for providing shape-stable, high-performance re-entry through an ablative/erosive environment has been developed. This concept involves injection of cold gas through an array of discrete sonic orifices. The gasous injectant produces a relatively thick layer of dense material which is designed to decelerate and break up incoming particles and droplets. The overall nosetip design rationale is presented and modeling predictions are compared to data obtained in two series of tests performed in a 10-MW arc facility with and without particle flow.

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Section: Fig 4 Post-test Photograph Of the Steel Modelsmentioning

confidence: 99%

Section: Ground Tests Experimental Apparatus (Series 1)mentioning

confidence: 99%

Section: Configuration Selectionmentioning

confidence: 99%

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