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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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Dynamic comparative calibration system measures response of miniature pressure transducers. The system is composed of an electromechanically driven metal diaphragm, a calibrated and an uncalibrated transducer and an oscillator.
Supported dual-mode burst diaphragm protects vacuum vessels from transient internal pressures. It forms the interface between the vacuum in the vessel and an external pressure.
Cathode support structure designed around a titanium diaphragm prevents radial misalignment between the cathode and anode in amplitrons. The titanium exhibits low thermal conductivity, tolerates lateral thermal expansion of the cathode, and is a poor primary and secondary emission medium.
Die and punch set forms convolutions in thin dished metal diaphragm without stretching the metal too thin at sharp curvatures. The die corresponds to the metal shape to be formed, and the punch consists of elements that progressively slide against one another under the restraint of a compressed-air cushion to mate with the die.
Radial, diaphragm separated injection method for variable thrust liquid rocket engines with or without mixture ratio variation
Diaphragm spring clutch mechanism is used in testing the relative merits of eddy-current and hysteresis dampers. The dampers are alternately coupled to a single damping boom shaft. The floating clutch mechanism enables the inoperative damper to remain completely isolated from the damping boom shaft during test of the other damper.
Vibrating diaphragm transducer for pressure measurements in wind tunnels - construction, sensitivity, stability, energy losses, and cost estimate
Lithium hydride cell uses vanadium diaphragm electrode as a hydrogen diffuser. Vanadium is high in hydrogen gas solubility and permeability, is least sensitive to adverse surface effects, maintains good mechanical strength in hydrogen atmospheres, and appears to be compatible with all alkali-halide electrolytes and lithium metals.
Influence of transverse diaphragm rigidity on temperature stresses in thin walled bars and shells of closed and open profile
New method replaces flowmeter approach with readily available burst diaphragm leak detector assembly mounted to all drain ports. This allows simultaneous leak detection of all flange seals under operating conditions.
Image converter camera and astronomical telescope arrangement for photographing metal diaphragm openings in shock tube
Reinforcing beam system for highly flexible diaphragms in valves or pressure switches
Piezoelectric sensing diaphragm for detection of micrometeorites in space, noting vibration mode and effect of small beads contact time on calibration errors
Diffused diaphragm pressure sensors in impact probes used in wind tunnel tests of dynamic response of supersonic air induction systems
Self opening em-operated secondary and ternary mylar diaphragms for expansion tubes and tunnels
Vibrating diaphragm gas pressure measuring system based on membrane damping, applying to prototype atmospheric entry probes
Transducer measures gas pressure profiles in high temperature, short duration, gas flows usually found in devices where pressure pulses may have durations of few microseconds to several milliseconds. Assembly includes fluid delay line, delay chamber, and flow restrictor for equalizing steady state pressure on diaphragm's sides
Knife structure for controlling rupture of shock tube diaphragms