Results 251 to 260 of about 8,361,162 (295)

Influencing Factors on Propulsive Performances of Water Droplets for Laser Propulsion

Journal of Propulsion and Power, 2010
A transversely excited at atmospheric pressure CO 2 laser operated at 10.6 μm and 5 μs pulse width was employed to ablate atomized water droplets for laser propulsion. The momentum was derived from the force sensor data. Experimental results indicated that coupling coefficient C m , specific impulse I sp , and internal efficiency η were increased ...
Xiuqian Li, Yanji Hong, Ming Wen, Cunyan Cui, Guoqiang He   +4 more
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Performance Matching of the Propulsion System

SAE Technical Paper Series, 1968
<div class="htmlview paragraph">The continuing requirement for weapon systems capable of efficient operation over a wide range of altitude, Mach number, and power setting emphasizes the importance of propulsion system off-design performance. This paper illustrates the effect of installation losses on this off-design performance and considers some
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Phoenix Landing Propulsion System Performance

45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &amp; Exhibit, 2009
The highly successful Mars Phoenix Lander utilized a unique (to extraterrestrial body landings) pulsed thruster approach to powered landing. The design, test and flight performance of this system will be summarized. Phoenix inherited its propulsion system design from the ill-fated Mars Polar Lander, MPL and addressed potential shortcomings in that ...
John McAllister, Carey Parish
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Titan III propulsion system performance evaluation.

Journal of Spacecraft and Rockets, 1968
An acceleration- based procedure for accurate determination of propulsion system performance from flight daja is described in this paper. The procedure emplpys iteration techniques to achieve a weighted least-squares ("best") fit to all of the applicable flight data.
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Hybrid Rocket Propulsion Performance Prediction

41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference &amp; Exhibit, 2005
The work performed in this effort used previously measured experimental subscale hybrid propellant data to develop a ground test motor in the 1000 pound-force range. This ground test motor was test fired and the test data was used to finalize a motor fuel grain geometry configuration and an oxidizer injector geometry. The ground tests were then used to
Robert Cavalleri, Richard Loehr
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Measurement of propulsive power and evaluation of propulsive performance from the wake of a self-propelled vehicle

Bioinspiration & Biomimetics, 2006
Propulsive efficiency is a key indicator of propulsive performance, but it can be difficult to measure when the propulsion system is integrated into the vehicle body because the average rate of useful work done propelling the vehicle (Wu) and/or the average mechanical power expended propelling the vehicle (Pmech) is not known directly.
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Performance verification of the Eurostar propulsion subsystem

Journal of Spacecraft and Rockets, 1990
Following the design of the EUROSTAR bipropellant combined propulsion subsystem (CPS), a test program has been undertaken to assess performance to and validate supporting analyses. The program has involved both simulant, cold-flow tests and live, propellant firings using flight standard hardware.
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Prediction and Measurement of Propulsion System Performance

Journal of Engineering for Industry, 1974
The problem of predicting installed propulsion system performance for a specific configuration from isolated inlet, nozzle and airframe data, and from data for similar configurations is discussed. The degree to which element performance may be isolated from measurements made on an integrated propulsion system will be discussed.
Victor Salemann, John Postlewaite
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Analysis of bionic hydrofoil propulsive performance

2011 IEEE International Conference on Mechatronics and Automation, 2011
Combined with the motion characteristics of turtles, a 2 degree-of-freedom periodic moving method is proposed for the single hydrofoil model of a hydrofoil propelled prototype. According to the hydrofoil hydrodynamic calculation formula, factors and motion parameters that affect thrust force produced by the hydrofoil are concluded.
Jian'an Xu, Na Yan, Mingjun Zhang
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Electric propulsion system performance evaluation

7th Electric Propulsion Conference, 1969
Experimental program for tests to identify primary electric propulsion system integration problems and solutions, emphasizing design and initial ...
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