Results 261 to 270 of about 53,861 (307)
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On the piston problem in gasdynamics
Mechanics Research Communications, 1984In a preceding paper [The moving load on a string as free boundary problem (to be published)] the author treated a free boundary problem concerning the moving load on a string; now he uses his method to the resolution of this typical example of a free boundary problem in gasdynamics.
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Constraint enforcement of piston motion in a free-piston engine
2014 American Control Conference, 2014Precise control of piston turnaround location is essential for reliable free-piston engine (FPE) operation. In this paper we derive a discrete-time, control-oriented, implicit model that describes FPE clearance height behavior by applying an energy balance to the Otto cycle.
Kevin Zaseck +2 more
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Study of the piston-rotation technique for piston-cylinder devices
Review of Scientific Instruments, 1978In piston-cylinder studies of reconstructive phase transitions, piston rotation plays a more subtle role than has previously been thought. Rotation of the piston not only relieves sliding friction, but also helps to activate sluggish transformations.
A B, Wolbarst, J B, Clark, P W, Richter
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A self-deactivating piston for a piston corer
Ocean Engineering, 1970Abstract Described is a piston containing an internal valve that is closed during penetration and open during extraction of the corer. It requires no cocking or other preparatory steps before use, and prevents liner collapse, core distortion, and consequent erroneous interpretation of the core materials as sometimes occurs when a conventional piston ...
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Tribological characteristics of piston rings in a single-piston hydraulic free-piston engine
Industrial Lubrication and Tribology, 2017Purpose A free-piston engine (FPE) is an unconventional engine that abandons the crank system. This paper aims to focus on a numerical simulation for the lubricating characteristics of piston rings in a single-piston hydraulic free-piston engine (HFPE).
Zhaoju Qin +3 more
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Effect of Piston and Piston Ring Designs on the Piston Friction Forces in Diesel Engines
SAE Technical Paper Series, 1981<div class="htmlview paragraph">How much reduction in piston friction loss can be achieved by the piston design?</div> <div class="htmlview paragraph">Piston friction force measurements have been carried out using the measuring method developed by the authors to obtain the effects of piston clearance, surface roughness, lubricant and ...
Shoichi Furuhama +2 more
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On the Piston Motion of a Free-Piston Shock Tube
Aeronautical Quarterly, 1965SummaryThe motion of a solid piston between the driver and test gases in a closed shock tube is studied. In particular, the piston stopping distance, i.e. the total length required to bring the piston to a stop, is calculated for various experimental conditions. Before the stop, the moving piston compresses the test gas, at first with its induced shock
Tzy C. Peng, Theo. F. Elbert
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Piston-retardation insert in a free-piston compressor
AIAA Journal, 1970The complete solution, expressed in terms of Eqs. (7, 10> and 11), gives the temperature profile along the fin in terms of the radiation-conduction parameter e, convection parameter (Biot modulus) X, environment temperature Oe, and fin geometry v.
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Dynamic of an Axial Piston Pump With Floating Pistons
BATH/ASME 2024 Symposium on Fluid Power and Motion ControlAbstract A new structure of the axial piston pump was proposed to address the limitation of its application under low viscosity medium conditions due to the insufficient oil film bearing capacity. The piston of this structure is in a floating state in the axial direction, and both ends of the piston are supported by a discrete cylinder ...
Baoyu Liu +5 more
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PISTON RING FOR A RECIPROCATING PISTON MACHINE
2001The invention relates to a reciprocating piston machine with at least one piston (5). Said piston is provided with at least one piston ring (6) that is located in a corresponding piston ring groove (7) of the piston (5), said piston ring groove having a supporting surface (8) that pertains to the piston ring (6).
MAN B & W DIESEL AS, MOCZULSKI LECH
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