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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.
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Rolling motion of 79-deg clipped delta wing configuration at supersonic speed - free flight investigation
Free-flight techniques for hypersonic wind tunnel - measurement of local pressure and heat transfer and aerodynamic characteristics of model under steady-state ablation conditions
Dynamic stability of slender cones subjected to high oscillation amplitude - measurement in wind tunnels by free flight techniques
Pressure telemeter for wind tunnel free flight pressure measurement
Stability data obtained in free flight and steady state facilities compared
Frequency modulated system to measure surface pressures on free flight models in conventional wind tunnels
Free flight dynamic stability measurements indicate that boundary layer transition has no perceptible effect
Free flight multibody test techniques, discussing drogue body testing, mechanized free flight models and salvo launches
Wind tunnel free-flight testing of reentry vehicle dynamics, noting capability for simultaneous two- dimensional viewing of model trajectories
Total aerodynamic forces and moments of free flying body in wind tunnel determined from accelerations measured and telemetered by onboard instruments
Launching device for free flying models in conventional wind tunnels consisting of split hollow shell enclosing model
Rapid opening mechanical gate valve consisting of blade assembly, blade catcher and primer holder used in conjunction with hypervelocity free flight range experiments
Free flight techniques adapted for high speed wind tunnel testing applications
Free falling probe test during terminal descent for determining unknown planetary atmosphere profile from onboard measurements alone
Total aerodynamic forces and moments of free flying body in wind tunnel determined from accelerations measured and telemetered by onboard instruments
The Hydrodynamic Focusing Bioreactor-Space (HFB-S) is being developed as a possible replacement for the Rotating Wall Perfused Vessel (RWPV) bioreactor currently planned for use on the International Space Station (ISS). The HFB-S is being developed with the ability to remove gas bubbles that may inadvertently enter the system during long duration experiments (approx. 1-3 months). The RWPV has been used in the past with great success on Shuttle flights and Mir missions, but has occasionally experienced problems with gas bubbles entering the fluid-filled vessel. These bubbles are harmful to the cell science, and bubble removal in the RWPV is problematic. The HFB-S has an access port on the rotation axis that allows for bubble removal under specific operating conditions without detrimentally affecting the cell tissue. Experiments on bubble removal with the HFB-S were conducted in the microgravity environment on NASA's KC-135 Reduced Gravity Aircraft. The first set of flights provided useful data on bubble trajectories that are validating computational predictions. The second set of flights free-floated the apparatus and tested the most recent configuration of the bioreactor while focusing on the bubble removal process itself. These experiments have shown that gas bubbles can successfully be driven to the removal port and purged in microgravity. The last day's experiments had an excellent microgravity environment due to calm air, and the experience gained in previous flights allowed successful bubble removal 18 out of 35 tries, remarkable given the microgravity time constraints and g-jitter on the KC-135.
Hydraulic support apparatus for dynamic testing of space vehicles under near-free flight conditions
Hydraulic support equipment for full scale dynamic testing of large rocket vehicle under free flight conditions