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NASA-TN-D-7192

Effect of fineness ratio on boattail drag of circular-arc afterbodies having closure ratios of 0.50 with jet exhaust at Mach numbers up to 1.30

contributor authorNASA - National Aeronautics and Space Administration (NASA)
date accessioned2017-09-04T16:44:31Z
date available2017-09-04T16:44:31Z
date copyright01/01/1973
date issued1973
identifier otherVXITDEAAAAAAAAAA.pdf
identifier urihttps://yse.yabesh.ir/std/handle/yse/107875
description abstractAn investigation was conducted to determine the effect of fineness ratio on the drag of circular-arc boattails at subsonic and low supersonic speeds. The boattails had closure ratios of 0.50 and incorporated convergent nozzles. The investigation was conducted statically and at Mach numbers from 0.40 to 1.30 at 0 deg angle of attack with jet total-pressure ratios varying from jet off to about 6, depending on Mach number. Low-fineness-ratio boattails had large separated-flow regions and the highest drag at all Mach numbers. Subsonic pressure-plus-friction drag levels were generally similar for boattails which did not have large separated regions. Drag-rise Mach number increased as boattail fineness ratio increased.
languageEnglish
titleNASA-TN-D-7192num
titleEffect of fineness ratio on boattail drag of circular-arc afterbodies having closure ratios of 0.50 with jet exhaust at Mach numbers up to 1.30en
typestandard
page95
statusActive
treeNASA - National Aeronautics and Space Administration (NASA):;1973
contenttypefulltext
subject keywordsAERODYNAMIC
subject keywordsAFTERBODIES
subject keywordsBOATTAILS
subject keywordsCOEFFICIENTS
subject keywordsDRAG
subject keywordsEXHAUST
subject keywordsFINENESS
subject keywordsJET
subject keywordsNOZZLES
subject keywordsRATIO
subject keywordsREDUCTION
subject keywordsTRANSONIC
subject keywordsTUNNELS
subject keywordsWIND


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