A simple antenna with good circular polarization.
Simple antenna with good circular polarization over wide space sector, showing geometry, normalized orthogonal field distributions and beamwidth range, considering slot combinations
Levenson, M. M.↗
SEARCH · Engineering Papers
Results for “slots”
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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Vee-notch tool cuts specimens
Triangular cutting tool uses carbide tips for notching heat-treated or abrasive materials, and alloys subjected to high structural stresses. The tool is rigidly mounted in a slot of mating contour to prevent deflection during cutting of tensile specimens. No other expensive machine equipment is required.
Spier, R. A.↗
Electrical test wire attachment device
Test lead wire attachment quickly and securely engages screw head by expansion against the side walls of the screw head slot. Heat shrinkable tubing is used for the forward and shaft ends to insulate the device from accidental contact.
Ferry, R. T.↗
Connector locking device
Slidable spring-loaded locking device eliminates need for safety wiring. Locking device is placed between the connector plug and connector receptacle. The threaded plug cannot vibrate loose because the insert is wedged into slots formed on the outer diameter of the receptacle.
Rabb, L. W.↗
Thermocouple installation in thin-walled tubes
Brazing process attaches thermocouples to slot in type-347 stainless steel tube flush around its circumference. Electrolytic flashing with gold enhances brazing process. This installation procedure does not significantly change calibration of thermocouples used and does not cause major wear spots in the thin-walled devices.
Curren, A. N.↗
Preliminary evaluation of a perforated sheet film-cooled linear in a turbojet combustor
Performance of turbojet combustors with perforated sheet film-cooled liners compared with stepped continuous-slot film-cooled liners
Fear, J. S.↗
Prediction of windage power loss in alternators
Simplified equations and constants, based on laminar and turbulent flow theory between parallel plates, estimate windage loss in rotating electrical machinery. Comparison of calculated results and experimental data for smooth cylindrical rotor and slotted alternator yields 7 percent maximum variation between calculated and experimental data.
Vrancik, J. E.↗
Metal-shearing energy absorber
Device, consisting of tongue of thin aluminum alloy strip, pull tab, slotted steel plate which serves as cutter, and steel buckle, absorbs mechanical energy when its ends are subjected to tensile loading. Device is applicable as auxiliary shock absorbing anchor for automobile and airplane safety belts.
Fay, R. J.↗
Time division radio relay synchronizing system using different sync code words for in sync and out of sync conditions Patent
Time division relay synchronizer with master sync pulse for activating binary counter to produce signal identifying time slot for station
Campbell, D. R.↗
Two-dimensional, supersonic mixing of hydrogen and air near a wall
Two dimensional, supersonic mixing of hydrogen injected from wall slot into airstream
Yates, C. L.↗
Nacelle afterbody for jet engines Patent
Afterburner-equipped jet engine nacelle with slotted configuration afterbody
Nichols, M. R.↗
Large-scale wind tunnel investigation of a ducted fan - Deflected-slipstream model with an auxiliary wing
Wind tunnel investigation of longitudinal aerodynamic characteristics of semispan wing deflected-slipstream configuration with double slotted flap and auxiliary wing
Falarski, M. D.↗
Combustor liner film cooling in the presence of high free-stream turbulence
Gas turbine combustor liner film cooling for slot geometries in presence of high free stream turbulence
Juhasz, A. J.↗
A doubly multiplexing dispersive spectrometer
Analysis of doubly multiplexing dispersive spectrometer with 19 entrance and 19 exit slots
Phillips, P. G.↗
An investigation of film-cooling effectiveness and skin friction in hypersonic turbulent flow
Flat plate surface film cooling by two dimensional tangent slot injection in hypersonic turbulent flow, measuring equilibrium temperatures and skin friction
Cary, A. M., Jr.↗
Compressible flow across shaft face seals
Compressible flow across shaft face seals and narrow slots, examining fluid inertia, viscous friction and entrance losses
Johnson, R. L.↗
FORTRAN program for computing coordinates of circular-arc, single and tandem, turbine and compressor, blade sections on a plane
Coordinates for circular arc blade section of aircraft high speed compressor gas turbines were computed using FORTRAN 4 program. Aerodynamic configurations studied include single segment airfoils, airfoils with slots, and mutiple segment tandem arranged airfoil.
Mcnally, W. D.↗
Importance of combining convection with film cooling
The interaction of film and convection cooling and its effect on wall cooling efficiency is investigated analytically for two cooling schemes for advanced gas turbine applications. The two schemes are full coverage- and counterflow-film cooling. In full coverage film cooling, the cooling air issues from a large number of small discrete holes in the surface. Counterflow film cooling is a film-convection scheme with film injection from a slot geometry. The results indicate that it is beneficial to utilize as much of the cooling air heat sink as possible for convection cooling prior to ejecting it as a film.
Colladay, R. S.↗