This report discusses cavity oscillation in general, and particularly the problem of cavity oscillation in the missile bays of cruise missile carrier aircraft during missile launch. The missile bay configurations analyzed ranged from the complete interior volume of a large transport aircraft, to the bomb bay of a conventional bomber. All of the carrier aircraft cases evaluated were conceptual; no specific airframe models or manufacturers are identified. The principles and technology presented are not limited to missile bays; they are applicable to general cavities having free-stream flow velocities above Mach 0.4. It is observed that above Mach 0.4 the pressure fluctuations in an oscillating cavity may arise from: (a) sustained periodic pressure fluctuations in the aperture shear layer that radiate noise into the cavity; and (b) sustained periodic pressure fluctuations in the aperture shear layer that couple with the cavity volume acoustic modes (this generally produces by far the most intense cavity oscillation). Theoretical/empirical techniques are presented for predicting oscillatory frequency, pressure level, pressure spatial distribution in the cavity, and the degree of alleviation achievable with suppressors. The information is based on extensive experimentation with subscale models having apertures of 2 to 6 in. in a cold air wall-jet flow facility. A bibliography is included containing 145 listings. (Author)
Cavity Oscillation in Cruise Missile Carrier Aircraft
1981
158 pages
Report
Keine Angabe
Englisch
Aircraft , Air & Space-Launched Missiles , Aerodynamics , Aerodynamic forces , Oscillation , Bays(Structural units) , Cavities , Resonance , Tactical aircraft , Vibration , Suppressors , Cruise missiles , Launching , Acoustic properties , Resonant frequency , Radiated noise , Flow noise , Boundary layer , Shear properties , Apertures , Volume , Jet flow , Air flow , Pressure distribution , Variations , Scale models , Air launched , Missile bays , Shear layers , CMCA(Cruise Missile Carrier Aircraft)
Cruise-missile-carrier navigation requirements
AIAA | 1980
|NTIS | 2004
|NTRS | 1982
NTIS | 2002
|NTIS | 2005
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