Mechanistic insight in the laser-pulse sputtering of polymers by combined photographiy and gas-dynamic analysis

Gas Dynamic Analysis of the CVC, A Novel Detonation Cycle

38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit ◽

10.2514/6.2002-4069 ◽

2002 ◽

Cited By ~ 2

Author(s):

Philip Snyder ◽

Berrak Alparslan ◽

Razi Nalim

Keyword(s):

Dynamic Analysis ◽

Gas Dynamic

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Analysis of a gas dynamic laser pulse amplifier

IEEE Journal of Quantum Electronics ◽

10.1109/jqe.1973.1077327 ◽

1973 ◽

Vol 9 (1) ◽

pp. 194-194

Author(s):

J. Caspar ◽

J. Verdieck ◽

B. Bronfin

Keyword(s):

Laser Pulse ◽

Gas Dynamic ◽

Pulse Amplifier

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Laser-pulse sputtering of aluminum: Vaporization, boiling, superheating, and gas-dynamic effects

Physical Review E ◽

10.1103/physreve.50.4716 ◽

1994 ◽

Vol 50 (6) ◽

pp. 4716-4727 ◽

Cited By ~ 136

Author(s):

Andrea Peterlongo ◽

Antonio Miotello ◽

Roger Kelly

Keyword(s):

Laser Pulse ◽

Dynamic Effects ◽

Gas Dynamic

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Gas-dynamic effects in the laser-pulse sputtering of AlN: is there evidence for phase explosion?

Applied Surface Science ◽

10.1016/s0169-4332(98)00203-7 ◽

1998 ◽

Vol 133 (4) ◽

pp. 251-269 ◽

Cited By ~ 22

Author(s):

Roger Kelly ◽

Antonio Miotello ◽

Aldo Mele ◽

Anna Giardini Guidoni ◽

John W. Hastie ◽

...

Keyword(s):

Laser Pulse ◽

Phase Explosion ◽

Dynamic Effects ◽

Gas Dynamic

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Gas-Dynamic Analysis of Processes in a Small-Sizes Two-Stroke Combustion Engine

The Open Mechanical Engineering Journal ◽

10.2174/1874155x01408010441 ◽

2014 ◽

Vol 8 (1) ◽

pp. 441-444 ◽

Cited By ~ 9

Author(s):

V. V. Biryuk ◽

A. A. Gorshkalev ◽

S. S. Kayukov ◽

D. A. Uglanov

Keyword(s):

Dynamic Analysis ◽

Combustion Engine ◽

Gas Dynamic

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Preliminary Design of a Double Expansion Through Flow Wave Rotor: Thermal and Gas Dynamic Analysis

Volume 6B: Turbomachinery ◽

10.1115/gt2013-94987 ◽

2013 ◽

Cited By ~ 1

Author(s):

Gilberto Materano ◽

Mark Savill

Keyword(s):

Thermal Analysis ◽

Shock Waves ◽

Dynamic Analysis ◽

Gas Turbine ◽

Gas Turbines ◽

Preliminary Design ◽

Wave Rotor ◽

Gas Dynamic ◽

Through Flow ◽

Specific Thrust

The wave rotor is a device capable of increasing the pressure of a fluid by deploying shock waves in a transient process. The operation principle is based on the shock tube where shock waves, rarefaction waves and contact waves result from the mixture of fluids with different levels of total pressure. The incorporation of a wave rotor into a gas turbine increases the machine thermal efficiency and reduces fuel consumption, thus allowing the development of new environmentally friendly technologies. The preliminary design of a wave rotor can be achieved by following two fundamental steps. Firstly, it is necessary to carry out a thermal analysis of the cycle in order to obtain the fluid state at each port of the device, secondly to track the different waves generated during the process in order to determine the dimensionality of the wave rotor. The thermal analysis can be accomplished if the performance of the wave rotor is predicted in advance, to set the trajectory of the cycle. The performance prediction can be obtained from the analytical solution of the one-dimensional equations used to describe compressible flow, in a gas dynamic evaluation. Among the available alternatives to perform the gas dynamic analysis, this work considers the algorithm of Weber, because it has proven to be robust by ensuring the mass balance across all the device ports, and also as this technique has not been used previously to evaluate the performance of propulsion gas turbines. In this study, four thermal cycles of gas turbine with a double expansion through-flow wave rotor were considered. These configurations come from changes of some processes in the thermal cycle to a turbofan implemented in business jets, which is set as the baseline engine. In each cycle the wave rotor is exposed to different velocities, expressed as Mach numbers, of the injected air that comes from the compressor, as well as different temperature ratios between this air and the gases that come from the combustion chamber in order to evaluate changes in the overall efficiency of the cycle and the specific thrust. The results obtained from this study show that not all the possible cases can be implemented in propulsion gas turbines, and none of the cases that prove to be suitable has a single point of operation. Rather they have a range of operations with maximum specific thrust and minimum specific fuel consumption, located at different operation conditions.

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Production of multi-MeV per nucleon ions in the controlled amount of matter mode (CAM) by using causally isolated targets

Laser and Particle Beams ◽

10.1017/s0263034607070140 ◽

2007 ◽

Vol 25 (1) ◽

pp. 85-91 ◽

Cited By ~ 20

Author(s):

C. STRANGIO ◽

A. CARUSO ◽

D. NEELY ◽

P.L. ANDREOLI ◽

R. ANZALONE ◽

...

Keyword(s):

Laser Pulse ◽

Low Power ◽

Laser Pulses ◽

Interaction Process ◽

Expansion Wave ◽

Comparison Standard ◽

Powerful Laser ◽

Power Pulse ◽

Gas Dynamic ◽

Rarefaction Shock

In several experiments, faster ions were produced from the backside of solid targets irradiated by powerful laser pulses. The ion acceleration was considered due to the negative electrostatic sheath formed on the backside of the target (TNSA), or to the expansion wave starting at the backside surface, or to the expansion wave and to its embedded electrostatic rarefaction shock. In this experiment, ions have been generated by transferring energy to a controlled amount of mass before the target become transparent by gas dynamic expansion (controlled amount of mass mode (CAM)). The targets used were thin transparent disks causally isolated from the holder to trim down, during the interaction process, unwanted effects due to the surrounding parts. Two kinds of target corresponding to a different set of parameters were designed (LARGE and SMALL). Both targets were conceived to survive, in the actual contrast conditions, to the low power pulse forerunning the giant laser pulse, bigger margin but lower performances being assigned to LARGE. For comparison standard square foils under the same focusing conditions, were also studied (LARGE-LIKE and SMALL-LIKE irradiation).

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