Results 231 to 240 of about 211,658 (259)
Some of the next articles are maybe not open access.
Piston Vibration in Piston-Cylinder Systems
Journal of Fluids Engineering, 1980The motion of a cylindrical piston falling in a liquid filled vertical cylinder is analyzed. It is found that concentric motion is impossible and that flow induced vibration is always associated with such piston-cylinder systems. If the clearance over radius ratio is larger than a certain critical value, βcr, severe wobble and piston-cylinder contact ...
I. Etsion, M. Magen
openaire +2 more sources
Development of Piston and Piston Ring Lubrication Analysis
SAE Technical Paper Series, 2015The reduction of CO2 emissions has become an imperative duty in order to cope with environmental compliance. For car manufacturers, CO2 emission has been set by regulation and many consumers prefer a fuel efficient car because of the increasing fuel price.
Yuichiro Kimura +6 more
openaire +3 more sources
On the Piston Motion of a Free-Piston Shock Tube [PDF]
Aeronautical Quarterly, 1965 SummaryThe 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
openaire +1 more source
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).
Yanpeng Yuan +3 more
openaire +2 more sources
Piston Velocities and Piston Work
Aircraft Engineering and Aerospace Technology, 1950WHEN evaluating engine efficiencies, mean effective pressures or the work done by the piston in internal combustion engines or compressors, it is generally assumed that the state of the working fluid is uniform throughout its mass. From this it follows that the expression for work where P denotes pressure and V, volume, holds.
J.S. Glass, J. Kestin
openaire +2 more sources
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 ...
openaire +2 more sources
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 +2 more
openaire +3 more sources
Nature, 1992
Transmembrane receptors monitor the extracellular environment and transmit information about changes in specific ligand concentration to the cytoplasm. It is not clear how the message gets across the cell membrane, but one proposal is that ligand binding induces a transmembrane conformational change in the receptor. Writing in Science late last
Pakula, Andrew, Simon, Melvin
openaire +3 more sources
Transmembrane receptors monitor the extracellular environment and transmit information about changes in specific ligand concentration to the cytoplasm. It is not clear how the message gets across the cell membrane, but one proposal is that ligand binding induces a transmembrane conformational change in the receptor. Writing in Science late last
Pakula, Andrew, Simon, Melvin
openaire +3 more sources
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.
openaire +2 more sources
ASME 2009 Dynamic Systems and Control Conference, Volume 2, 2009
A dynamic model of a free liquid piston that exploits piston geometry to produce a high inertance was developed for use in a free piston engine compressor. It is shown that for the size scale targeted, advantageous piston dynamics can be achieved with a reduced piston mass compared to a rigid piston design.
Eric J. Barth, Joel A. Willhite
openaire +2 more sources
A dynamic model of a free liquid piston that exploits piston geometry to produce a high inertance was developed for use in a free piston engine compressor. It is shown that for the size scale targeted, advantageous piston dynamics can be achieved with a reduced piston mass compared to a rigid piston design.
Eric J. Barth, Joel A. Willhite
openaire +2 more sources