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Estimating Mass of Inflatable Aerodynamic Decelerators Using Dimensionless ParametersThis paper describes a technique for estimating mass for inflatable aerodynamic decelerators. The technique uses dimensional analysis to identify a set of dimensionless parameters for inflation pressure, mass of inflation gas, and mass of flexible material. The dimensionless parameters enable scaling of an inflatable concept with geometry parameters (e.g., diameter), environmental conditions (e.g., dynamic pressure), inflation gas properties (e.g., molecular mass), and mass growth allowance. This technique is applicable for attached (e.g., tension cone, hypercone, and stacked toroid) and trailing inflatable aerodynamic decelerators. The technique uses simple engineering approximations that were developed by NASA in the 1960s and 1970s, as well as some recent important developments. The NASA Mars Entry and Descent Landing System Analysis (EDL-SA) project used this technique to estimate the masses of the inflatable concepts that were used in the analysis. The EDL-SA results compared well with two independent sets of high-fidelity finite element analyses.
Document ID
20110014351
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Samareh, Jamshid A. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 25, 2013
Publication Date
June 6, 2011
Subject Category
Lunar And Planetary Science And Exploration
Report/Patent Number
NF1676L-12864
Paper No. IPPW-8-6B
Meeting Information
Meeting: 8th International Planetary Probe Workshop 2011 (IPPW-8)
Location: Portsmouth, VA
Country: United States
Start Date: June 6, 2011
End Date: June 10, 2011
Funding Number(s)
WBS: WBS 599489.02.07.07.21.21.02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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