Design, fabrication and test of Load Bearing multilayer insulation to support a broad area cooled shield

Dye, Scott; Johnson, Wesley L.; Plachta, David W.; Mills, Gary L.; Buchanan, Liam; Kopelove, A.

doi:10.1016/j.cryogenics.2014.06.001

Cited by 16 publications

(4 citation statements)

References 6 publications

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“…Namely, any compression of MLI under a load increases the conductivity from layer to layer, reducing its thermal performance significantly. Based on the IMLI technology, wrapped MLI [68] for feed lines, load responsive MLI [67] (using dynamic spacers) for supporting a lightweight integrated vacuum shell, or load bearing MLI [69] for self supporting a VCS are under development.…”

Section: Insulation Materialsmentioning

confidence: 99%

Cryogenic hydrogen fuel tanks for large hypersonic cruise vehicles

Sharifzadeh

Verstraete

Hendrick

2015

International Journal of Hydrogen Energy

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Section: Insulation Materialsmentioning

confidence: 99%

Cryogenic hydrogen fuel tanks for large hypersonic cruise vehicles

Sharifzadeh

Verstraete

Hendrick

2015

International Journal of Hydrogen Energy

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“…12 The two driving requirements were the reuse of the existing hardware from the previous testing and supporting the Broad Area Cooling (BAC) shield off of the blankets to cut any thermal shorts between the shield and the tank wall.…”

Section: B Inner Multilayer Insulationmentioning

confidence: 99%

“…In order to facilitate the rapid evacuation, 6 mm (0.25 inch) perforations totaling an open area of 0.01% were regularly spaced within the blanket. 12 The Inner MLI blanket was attached to the SOFI and to the BAC shield via epoxied velcro strips. Thus the load path supporting the BAC shield and outer MLI went to the tank through the Velcro attachments on the BAC shield, the LB-MLI, the Velcro attachments to the SOFI, the SOFI, and finally to the tank wall.…”

Section: B Inner Multilayer Insulationmentioning

confidence: 99%

Tank Applied Testing of Load-Bearing Multilayer Insulation (LB-MLI)

Johnson

Valenzuela

Feller

et al. 2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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The development of long duration orbital cryogenic storage systems will require the reduction of heat loads into the storage tank. In the case of liquid hydrogen, complete elimination of the heat load at 20 K is currently impractical due to the limitations in lift available on flight cryocoolers. In order to reduce the heat load, without having to remove heat at 20 K, the concept of Reduced Boil-Off uses cooled shields within the insulation system at approximately 90 K. The development of Load-Bearing Multilayer Insulation (LB-MLI) allowed the 90 K shield with tubing and cryocooler attachments to be suspended within the MLI and still be structurally stable. Coupon testing, both thermal and structural was performed to verify that the LB-MLI should work at the tank applied level. Then tank applied thermal and structural (acoustic) testing was performed to demonstrate the functionality of the LB-MLI as a structural insulation system. The LB-MLI showed no degradation of thermal performance due to the acoustic testing and showed excellent thermal performance when integrated with a 90 K class cryocooler on a liquid hydrogen tank.

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“…[5], Load Bearing MLI in which the spacers self-support a Broad Area Cooled shield without the heat leak of tank supports Ref. [6], and MMOD-MLI where the spacers support high strength ballistic layers to provide micrometeoroid/orbital debris shielding.…”

Section: Introductionmentioning

confidence: 99%