of Apollo Capsule Aerodynamics for Hypersonic Rare(cid:2)ed Conditions
of Apollo Capsule Aerodynamics for Hypersonic Rare(cid:2)ed Conditions
复制标题
高超音速罕见(cid:2)条件下的阿波罗太空舱空气动力学
DOI:
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发表时间:
2006
期刊:
影响因子:
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通讯作者:
F. A. Greene
中科院分区:
文献类型:
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作者:
J. Moss;C. Glass;F. A. Greene
Results are presented show the sensitivity of the capsule aerodynamics to rarefaction(cid:2) velocity variations at an altitude of (cid:17)(cid:7)(cid:9) km(cid:2) sensitivity to grid resolution(cid:2) and chemistry model assumptions of species(cid:10) at (cid:21)(cid:9) km with the NS simulations(cid:8) The DSMC results presented herein along with data from some recent studies (cid:4)(cid:8)(cid:9)(cid:4)(cid:10) demonstrate available capability to address the transitional (cid:12)ow aerodynamics of capsules such the CEV(cid:2) a capability that did not exist when the Apollo Command Module design was evolved(cid:8) The current results show that the lift and lift(cid:11)to(cid:11)drag coe(cid:5)cients increase substantially with decreasing rarefac(cid:11) tion(cid:8) Also(cid:2) the location of the longitudinal center of pressure is very sensitive to the degree of rarefaction and the simulations show that the stable trim point for the Apollo capsule at (cid:17)(cid:7)(cid:9) km altitude occurs at an incidence angle of (cid:11)(cid:17)(cid:15)(cid:4) degrees rather than the nominal (cid:11)(cid:14)(cid:9) degrees (cid:12)own by Apollo (cid:15)(cid:22) that is(cid:2) the capsule is statically unstable for much(cid:2) if not all(cid:2) of the transitional (cid:12)ow regime(cid:2) a result not that for capsules as discussed by Wilmoth et al(cid:8) (cid:4)(cid:11) for the Stardust sample return capsule and Moss et al(cid:8) (cid:4)(cid:5) for the Path(cid:16)nder capsule(cid:8) Results of the simulations for variations in free(cid:11)stream velocity show that the in