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Analysis of Base Drag Reduced by Side Holes in the Projectile with Base Cavity(PDF)

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
1997年01期
Page:
21-24
Research Field:
Publishing date:

Info

Title:
Analysis of Base Drag Reduced by Side Holes in the Projectile with Base Cavity
Author(s):
WangZhongyuan
School of Dynamic Engineering,NUST,Nanjing 210094
Keywords:
drag numerical computatio n hollow base cart riag es super sonic flow
PACS:
V211
DOI:
-
Abstract:
T he f light dr ag of a project ile includes w ave, base, fr ict io n drag under supersonic speed, and the base drag is about 20~40 per cent in total drag . T o reduce the f light dr ag o f a projectile is ver y useful to it s t rajectory . A mechanical model about a project ile w ith base cavity and side holes, w hich could reduce the base drag in supersonic speed, has been put forward in this paper . Since the compar ison betw een calculat ions and ex perimental result s is in g ood ag reement , the model could be taken as a basis for study ing the drag reducing ef fect of side holes and to make an engineering predict io n. In the end, the inf luence of dif ferent parameters of side holes on base dr ag has been discussed.

References:

1  Edg ar M G. Pr eliminary inv estig atio n of effect iveness o f bass bleed in r educing drag o f blunt-base bodies in super so nic stream . NASA RM26, 1971
2 Elizabeth R D. The effectiv eness o f base-bleed in reducting drag o f bo at-tailed bo dies a t supersonic velocities. PB157711, 1970
3 丁则胜. 尾部外形对底部排气弹减阻性能的影响. 弹道学报, 1994( 3) : 74~79
4 So rbanescu E. Dr ag r eduction of perfo rat ed ax isym metric bo dies in supersonic flow . J o f Spacecr aft & Rocket, 1985, 22( 6) : 663~665
5 杨山乍生, 俞守勤. 飞行器部件空气动力学. 北京: 国防工业出版社, 1981. 173~207
6 浦发, 王中原. 减阻增程的潜力及其可能途径的分析. 弹道学报, 1986( 3) : 38~42
7 M oor e F G. Body alo ne aer odynamics o f g uided and ung uided pro jectiles in subso nic, tr ansonic and superso nic Mach numbers. NWL TR- 3769, 1972

Memo

Memo:
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Last Update: 2013-03-29