Keyword: Nozzles

Briefs: Mechanical & Fluid Systems
Computer Program Predicts Rocket Noise

A computer program predicts the noise and ignition over pressure in the vicinity of a rocket during launch. The program has been developed to complement the vibroacoustic-prediction effort for rockets now in use and to provide the capability for prediction of vibroacoustic loads associated with...

Briefs: Physical Sciences
Study of Fusion-Driven Plasma Thruster With Magnetic Nozzle

A report presents a computational study of a proposed plasma thruster for a spacecraft. The behavior of the plasma was computationally simulated by use of a mathematical model of magnetohydrodynamic flow implemented in the previously developed MACH2 computer program. To increase...

Briefs: Mechanical & Fluid Systems

Flow-concentrating supersonic gas/liquid nozzles have been invented for use in cleaning and in verifying the cleanliness of tanks, pipes, tubes, machine parts, and structures. The overall...

Briefs: Test & Measurement

The development of miniature, cold- gas thrusters for on-orbit propulsion of such small devices as remotely piloted cameras and for inclusion in astronaut propulsion backpacks gave rise to a need to measure...

Briefs: Test & Measurement
Laser Heating for Testing Rocket-Engine Insulating Phenolic

A continuous-wave CO2 laser has been selected as a source of heat for testing the thermal response of carbon-cloth phenolic like that used as insulating material in a reusable solid-fuel rocket motor (RSRM). The particular thermal response of interest, observed during...

Briefs: Motion Control
Small-Stroke, High-Frequency Reciprocating Pump

A proposed reciprocating pump would operate at a small stroke and would contain no sliding parts. The oscillatory motion of a piston in the pump could be provided by a magnetostrictive actuator, for example.

Briefs: Robotics, Automation & Control
Gimbaled Injectors for Testing Spacecraft Thrusters

A report proposes an assembly of gimbaled valve/nozzle subassemblies for use in injecting either a propellant fluid (e.g., monomethyl hydrazine) or a propellant-simulating fluid (e.g., water) into the combustion chamber of a spacecraft thruster during hot-fire or cold testing, respectively. The...

Briefs: Motion Control

An apparatus called a "pneumatic stinger" has been developed to enable a first spacecraft, operating under remote control, to grasp a second spacecraft that is in orbit or other...

Briefs: Physical Sciences

Programmable multizone furnaces with enhanced designs have been proposed for use in processing materials by directional solidification or, optionally, by related techniques of...

Briefs: Robotics, Automation & Control
Performance of an Arc-Jet Thruster

A report discusses the design and testing of a laboratory-model arc-jet thruster designed to operate at a nominal power level of 300 W. This thruster is an intermediate product of continuing efforts to develop smaller, lower-power, higher-specific-impulse thrusters for use in a forthcoming generation of small...

Briefs: Physical Sciences

A unique dual-flow, cold-jet facility has been developed and operated by California Polytechnic State University (Cal Poly) at San Luis Obispo for NASA Dryden Flight Research Center....

Briefs: Robotics, Automation & Control

Miniature, lightweight, low-power, low-vibration Joule-Thomson Rankine-Cycle refrigerators have been proposed for cooling portable scientific instruments. These refrigerators would be made...

Briefs: Materials

More accurate analyses of adhesive EA946 can now be accomplished using new mathematical models. Tests involving this adhesive (used in the space shuttle's reusable solid-rocket-motor nozzle and other...

Briefs: Robotics, Automation & Control

A rib valve is under consideration for use as a shutter in an air swirler in the fuel nozzle of a variable-geometry combustor. In the original application, the variable-geometry...

Briefs: Physical Sciences

We have developed an apparatus that generates a pulsed beam of fast oxygen atoms, under Small Business Innovation Research (SBIR) funding by NASA's Jet Propulsion Laboratory, to...

Briefs: Physical Sciences

Scanning-mode shadowgraphy has been proposed as an alternative optical technique for diagnosis of shock waves. Under suitable conditions, scanning-mode shadowgraphy could overcome the...