Title

Investigation Of Ablation Effects On Hypersonic Dynamic Stability Of A 10 Deg. Cone.

Date

1967

Index Abstract

Coming Soon

Photo Quality

Complete

Report Number

AFFDL TR 66-230

Creator

Moore, Dave R.

Stalmach, Charles J., Jr.

Pope, Thomas C.

Corporate Author

LTV Aerospace Corp Dallas Tex LTV Vought Aeronautics Div

Laboratory

Air Force Flight Dynamics Laboratory

Extent

88

Identifier

AD0656492

Access Rights

Distribution of this report is unlimited

Distribution Classification

1

Contract

AF 33(615)-2902

DoD Project

8219

DoD Task

821902

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Abstract

An experimental program has been conducted in the LTV Hypervelocity Wind Tunnel at M = 17 to investigate the effects of ablation product characteristics and thermal lags on re-entry vehicle dynamic stability. The free oscillation method of dynamic stability measurement was used and the ablation processes were simulated by the controlled mass injection through four sections of the porous model skin. The flow rates through the top and bottom quadrants were oscillated at the same frequency and at an amplitude proportional to the model motion. The thermal lag effect was investigated with nitrogen injection into nitrogen tunnel flow at several different mass flow rates and phase angles between the oscillating mass flow and the body motion. The ablation product study was conducted by injecting gases other than nitrogen with specific heat ratio and molecular weight being the test parameters in addition to mass flow rate. The results obtained from these tests indicate significant effect on dynamic stability with both injection phase angle and some characteristics of the injected gas. The effects of model frequency, Reynolds number and mass injection distribution were also investigated and some static pressure measurements were made near the aft of the model. Appendices to the report contain tabulations of the pertinent data and discussions of supporting analytical studies and data analysis.

Report Availability

Full text available

Date Issued

1967-01

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource