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Further Validation of a CFD Code for Calculating the Performance of Two-Stage Light Gas Guns
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Author and Affiliation:
Bogdanoff, David W.(Analytical Mechanics Associates, Inc., Moffett Field, CA, United States)
Abstract: Earlier validations of a higher-order Godunov code for modeling the performance of two-stage light gas guns are reviewed. These validation comparisons were made between code predictions and experimental data from the NASA Ames 1.5" and 0.28" guns and covered muzzle velocities of 6.5 to 7.2 km/s. In the present report, five more series of code validation comparisons involving experimental data from the Ames 0.22" (1.28" pump tube diameter), 0.28", 0.50", 1.00" and 1.50" guns are presented. The total muzzle velocity range of the validation data presented herein is 3 to 11.3 km/s. The agreement between the experimental data and CFD results is judged to be very good. Muzzle velocities were predicted within 0.35 km/s for 74% of the cases studied with maximum differences being 0.5 km/s and for 4 out of 50 cases, 0.5 - 0.7 km/s.
Publication Date: Sep 01, 2017
Document ID:
20170011636
(Acquired Dec 15, 2017)
Subject Category: SPACECRAFT DESIGN, TESTING AND PERFORMANCE; FLUID MECHANICS AND THERMODYNAMICS
Report/Patent Number: NASA/TM-2017-219571, ARC-E-DAA-TN44410
Document Type: Technical Report
Contract/Grant/Task Num: NNA15BB15C
Financial Sponsor: NASA Ames Research Center; Moffett Field, CA, United States
Organization Source: NASA Ames Research Center; Moffett Field, CA, United States
Description: 20p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Public use permitted
NASA Terms: LIGHT GAS GUNS; COMPUTATIONAL FLUID DYNAMICS; CONDUCTIVE HEAT TRANSFER; PROJECTILES; FRICTION FACTOR; HEAT TRANSFER; LAUNCHING; EQUATIONS OF STATE; HIGH PRESSURE; IGNITION; COMBUSTION; KINETIC ENERGY; MASS TRANSFER
Other Descriptors: BALLISTIC RANGE
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