SEARCH · Engineering Papers
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.
Nighttime F layer recombination and diffusion coefficients estimated from incoherent scatter measurements of electron densities and electron and ion temperatures
A 1/13-scale model of the forebody of the Republic F-105 with twin-duct wing-root inlets was tested in the Langley 4- by 4-foot supersonic pressure tunnel through a range of angle of attack from -4 deg to 15 deg at a Mach number of 2.01 and a Reynolds number of approximately 3.4 x 10(exp 6) per foot. The tests were made with four configurations which incorporated varying amounts of sweep and stagger of the inlet leading edges, modifications to the areas of the boundary-layer diverter floor plate, and modifications to the area of the boundary-layer diverter bleed slots. The highest overall pressure recovery at an angle of attack of 0 deg (average total-pressure recovery, 0.84 mass-flow ratio, 0.98) was achieved with configuration having an inlet leading-edge sweep angle of 58 deg with no leading-edge stagger. Stagger was found to improve the angle-of- attack performance, but at a sacrifice in inlet efficiency for an angle of attack of 0 deg. The boundary-layer diverter floor height, of the order of one boundary-layer thickness, was satisfactory for bypassing the fuselage boundary layer. The boundary-layer diverter-plate bleed slots were effective in increasing the total-pressure recovery of the inlet. The total-pressure-recovery contour plots, taken at the compressor-face station, indicate the existence of high-velocity "cores" throughout the inlet operating range.
Thermionic diode sensor is used as a pressure transducer in advanced space power systems using liquid metals as working and heat transfer media at temperatures up to 1800 deg F. The sensor converts the motion of a pressure actuated refractory alloy capsule into a suitable electrical output.
Recursion formulas for coefficients of f and g series
Applications Technology Satellite F and G project analytical report including description of 30 foot diameter, deployable spacecraft antenna with good RF performance up to 10 GHz
High-performance once-through boiling of potassium in single tubes at saturation temperatures of 1500 deg to 1750 deg F - application to design of large power boiler
High strength nickel base alloy with improved oxidation resistance up to 2200 degrees F for applicability to gas turbine engine components
Modifying the chemistry of the NASA TAZ-8 alloy and utilizing vacuum melting techniques provides a high strength, workable nickel base superalloy with improved oxidation resistance for use up to 2200 degrees F.
G-factors of F centers in alkali halide crystals determined by electron spin resonance measurements
Corrosion products of oxygen doped tantalum exposed to potassium at 1800 deg F
Goddard range and range rate system performance while tracking IMP-F
High resolution scanning radiometer for cloud cover and cloud motion observation from Applications Technology Satellites F and G
Geomagnetic field component control of vertical drift in F region of ionosphere
Spin-lattice interactions of ions with unfilled F-shells measured by electron spin resonance in uniaxially stressed crystals
Incoherent backscatter observations of F region during solar eclipse
Nighttime behavior of ionospheric F region studied using incoherent scatter sounder
Instrumentation data for low energy solar cosmic ray measurements using OGO-F satellite