Oscillatory combustion in rockets Third semiannual report, Jun. 1 - Nov. 30, 1965
Rocket engine oscillatory combustion studies
ROCKET ENGINE↗
SEARCH · Search NASA
Results for “Oscillatory”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Low-speed Measurements of Oscillatory Lateral Stability Derivatives of a Model of 60 Deg Delta-wing Bomber
Low speed measurements of oscillatory lateral stability derivatives of 60 degree delta wing bomber model
BOMBER AIRCRAFT↗
Oscillatory properties of certain nonlinear matrix differential systems of second order.
Oscillatory properties of linear matrix differential system, applying generalization of polar coordinate transformation to certain systems of second order
NONLINEAR SYSTEM↗
Oscillatory magnetostriction in n-gallium antimonide.
Oscillatory magnetostriction in GaSb, noting stress effect on energy bands
STRESS MEASUREMENT↗
On the stability constraints and oscillatory behavior of coupled systems.
Coupled systems stability constraints and oscillatory behavior, discussing feedback path nonlinearities using differential equations
NONLINEAR FEEDBACK↗
Evaluation of space lubricants under oscillatory and slow speed rotary motion.
Solid film space lubricant methods evaluated for friction surfaces under oscillatory and slow speed rotary motion
Vest, C. E.↗
Oscillatory modes of energy transport in solar magnetic regions.
Sunspot energy transport from oscillatory instabilities indicated from calculations on hydromagnetic stability of thermally unstable layers with open boundary conditions
Danielson, R. E.↗
Closed-form approximate solutions to the oscillatory plasma continuity equations
Closed-form approximate solutions to oscillatory plasma continuity equations
Nichols, L. D.↗
Possible use of half-model oscillatory techniques for the study of shuttle abort separation dynamics
Half model technique for oscillatory study of abort separation dynamics of space shuttles
Orlik-Ruckemann, K. J.↗
Oscillatory magnetostriction and deformation potentials in bismuth
Oscillatory transverse and longitudinal magnetostriction in single crystal Bi, obtaining deformation potentials
Aron, P. R.↗
Oscillatory flow measurements with a directionally sensitive laser velocimeter
Oscillatory flow measurements by directionally sensitive laser velocimeter, discussing concept, design and construction
Denison, E. B.↗
Accurate approximate solutions to oscillatory problems with perturbing singular damping
Accurate approximative solution to differential equations of oscillatory problem with perturbing damping
Tang, C. C. H.↗
Effects of oscillatory magnetic fields on the flux flow properties of superconducting foils
Oscillatory magnetic field superimposition effects on flux flow properties of superconducting metal foils
Joiner, W. C. H.↗
The reduction of the solar velocity field into its oscillatory and slowly-varying components
Spectroheliogram Doppler movies of solar velocity fields showing oscillatory and slowly varying components
Bhatnagar, A.↗
Measurements of the oscillatory and slowly-varying components of the solar velocity field
Solar velocity field decomposition into oscillatory and slowly varying components by spectroheliograms with high spatial resolution
Bhatnagar, A.↗
Oscillatory burning of solid propellants including gas phase time lag.
An analysis has been performed for oscillatory burning of solid propellants including gas phase time lag. The gaseous flame is assumed to be premixed and laminar with a one-step overall chemical reaction. The propellant is assumed to decompose according to the Arrenhius Law, with no condensed phase reaction. With this model, strong gas phase resonance has been found in certain cases at the characteristic gas-phase frequencies, but the peaking of the acoustic admittance is in the direction favoring the damping of pressure waves. At still higher frequencies, moderate wave-amplifying ability was found. The limit of low frequency response obtained previously by Denison and Baum was recovered, and the limitations of the quasi-steady theory were investigated.
T'Ien, J. S.↗
Investigation of the effect of hub support parameters on two-bladed rotor oscillatory loads
The results are presented of a test program and analysis to investigate the effects of inplane hub support parameters on the oscillatory chordwise loads of a two-bladed teetering rotor. The test program was conducted in two phases. The first consisted of a shake test to define the impedance of a number of test configurations as a function of frequency. The second phase was the test of these configurations in the NASA-Langley transonic dynamics tunnel. The test showed that the one-per-rev inplane bending moments could be changed by a factor of 2.0 as a function of the pylon configuration at the same aerodynamic operating condition. The higher harmonic inplane, flapwise, and torsional bending moments, and pitch link axial loads were not affected by changes in inplane hub impedance. The maximum inplane loads occurred for the pylon configuration with the minimum spring rate and maximum inertia.
Lee, C. D.↗
Aerodynamic damping and oscillatory stability in pitch of a model of a proposed manned lifting entry vehicle at Mach Numbers of 1.80, 2.16, and 2.86
Wind tunnel tests were conducted using a model of a proposed manned lifting entry vehicle to determine the aerodynamic damping and oscillatory stability in pitch. The model was tested at Mach numbers of 1.80, 2.16, and 2.86. Angles of attack varied from minus 2 degrees to plus 30 degrees at zero angle of sideslip using a small-amplitude, forced-oscillation technique. It was determined that, in general, all the configurations have near zero or slightly positive damping in pitch throughout the angle of attack range. The effects of the deflection of flaps on aerodynamic damping are discussed.
Kilgore, R. A.↗