Dynamic Characteristics of a 9-deg Cone with and Without Asymmetries at Mach Number 10 PDF Download
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Languages : en
Pages : 0
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Wind tunnel tests were conducted at Mach number 10 on a 9-deg half-angle cone model using a unique dynamic stability balance having three angular degrees of freedom. Data obtained at Re = 1,970,000 on models having different types of compound asymmetries revealed vast differences in the developed motion. A model with a center-of-gravity offset and a small, out-of-plane nose slice as the second asymmetry was found to have a totally unexpected type of instability. The instability was the rapid divergence of the precession arm caused by a Magnus-type moment resulting from an out-of-plane force generated by the nose slice. When the slice was removed (sharp nose model) and the second asymmetry applied by uing a small tab at the base, the classical roll resonance was found. (Author).
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Languages : en
Pages : 0
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Book Description
Wind tunnel tests were conducted at Mach number 10 on a 9-deg half-angle cone model using a unique dynamic stability balance having three angular degrees of freedom. Data obtained at Re = 1,970,000 on models having different types of compound asymmetries revealed vast differences in the developed motion. A model with a center-of-gravity offset and a small, out-of-plane nose slice as the second asymmetry was found to have a totally unexpected type of instability. The instability was the rapid divergence of the precession arm caused by a Magnus-type moment resulting from an out-of-plane force generated by the nose slice. When the slice was removed (sharp nose model) and the second asymmetry applied by uing a small tab at the base, the classical roll resonance was found. (Author).
Author: L. K Ward (Jr)
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Category :
Languages : en
Pages : 24
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Book Description
Wind tunnel tests were conducted at Mach number 10 on a 9-deg half-angle cone model using a unique dynamic stability balance having three angular degrees of freedom. Data obtained at Re = 1,970,000 on models having different types of compound asymmetries revealed vast differences in the developed motion. A model with a center-of-gravity offset and a small, out-of-plane nose slice as the second asymmetry was found to have a totally unexpected type of instability. The instability was the rapid divergence of the precession arm caused by a Magnus-type moment resulting from an out-of-plane force generated by the nose slice. When the slice was removed (sharp nose model) and the second asymmetry applied by uing a small tab at the base, the classical roll resonance was found. (Author).
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Category : Aeronautics
Languages : en
Pages : 818
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Author: A. E. Hodapp (Jr.)
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Category : Aerodynamics, Hypersonic
Languages : en
Pages : 32
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Author: R. H. Urban
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Category : Hypersonic wind tunnels
Languages : en
Pages : 28
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Author:
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Category : Aerodynamics
Languages : en
Pages : 580
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Author: B. L. Uselton
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Category :
Languages : en
Pages : 23
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Tests were conducted in the 50-in. Mach 10 wind tunnel of the von Karman Gas Dynamics Facility to determine the dynamic stability characteristics of a 10-deg half-angle cone at large amplitudes of oscillation. Support interference effects were also investigated. A free oscillation, high-amplitude (+ or - 35 deg) gas bearing balance supported by a transverse rod and yoke system was used. Data were obtained at a nominal Mach number of 10 at Reynolds numbers, based on the model base diameter, ranging from 0.46 to 1.84 x 10 to the 6th power. The dynamic and static stability data are compared with data obtained with a sting-supported model, range data, flow field theory, and conical flow theory. Selected test results are presented. (Author).
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Category : Technology
Languages : en
Pages : 1446
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Author:
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ISBN:
Category : Science
Languages : en
Pages : 992
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Author:
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ISBN:
Category : Science
Languages : en
Pages : 1160
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