Numerical Experiments Associated With Gas Dynamic Lasers
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Numerical Experiments Associated With Gas Dynamic Lasers
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Author : John David Anderson (Jr.)
language : en
Publisher:
Release Date : 1970
Numerical Experiments Associated With Gas Dynamic Lasers written by John David Anderson (Jr.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Gas lasers categories.
A previous time-dependent finite-difference numerical solution of second order accuracy for quasi-one-dimensional nonequilibrium nozzle flows using 3 terms of a Taylor's series expansion in time is modified such that only 2 terms of a series expansion are required for second order accuracy. As a result, an already straightforward analysis of nonequilibrium nozzle flows is made even simpler. With the present solution, numerical experiments are carried out for gas dynamic laser flows in order to study the consequences of large H2O content, high reservoir pressures and small nozzle throat heights. (Author).
Gasdynamic Lasers An Introduction
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Author : John D. Jr. Anderson
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Gasdynamic Lasers An Introduction written by John D. Jr. Anderson and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
Gasdynamic Lasers: An Introduction is a 12-chapter introductory text to major development generations of gasdynamic lasers, focusing on their underlying physical and fundamental aspects. The opening chapters discuss the basic detailed physical phenomena that ultimately are responsible for producing gasdynamic laser action and the methods of calculating the performance of these devices. These topics are followed by a chapter on confirmation of the performance calculations through arc and shock tunnel experiments. The discussion then shifts to vibrational relaxation process behind normal shock waves in CO2-N2-He mixtures and assesses their population inversions occurring in the nonequilibrium flow. Other chapters explore the concepts of downstream mixing and optical cavity in gasdynamic lasers, as well as the laser beam extracted from these devices. A systematic study of aerodynamic windows that use supersonic flow across the aperture is presented in the concluding chapters, along with the phenomena associated with gasdynamic laser diffusers. This introductory text will be of great value to professional scientists and engineers, as well as to students and workers in the field who are interested in interdisciplinary applied science.
A Computer Program For Co2 N2 H2o Gasdynamic Laser Gain And Maximum Available Power
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Author : Walter J. Glowacki
language : en
Publisher:
Release Date : 1971
A Computer Program For Co2 N2 H2o Gasdynamic Laser Gain And Maximum Available Power written by Walter J. Glowacki and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Gasdynamic lasers categories.
A Fortran IV computer program is presented for the calculation of small-signal gain and maximum available energy for CO2-N2-H2O gasdynamic lasers. In comparison to an earlier version, the present program contains several computational improvements which result in a dramatic, order-of-magnitude reduction in computation time. These improvements are discussed in detail. (Author).
Numerical Experiments Associated With Gas Dynamic Lasers
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Author : John D Anderson (Jr)
language : en
Publisher:
Release Date : 1970
Numerical Experiments Associated With Gas Dynamic Lasers written by John D Anderson (Jr) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.
A previous time-dependent finite-difference numerical solution of second order accuracy for quasi-one-dimensional nonequilibrium nozzle flows using 3 terms of a Taylor's series expansion in time is modified such that only 2 terms of a series expansion are required for second order accuracy. As a result, an already straightforward analysis of nonequilibrium nozzle flows is made even simpler. With the present solution, numerical experiments are carried out for gas dynamic laser flows in order to study the consequences of large H2O content, high reservoir pressures and small nozzle throat heights. (Author).
Nasa Technical Note
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Author :
language : en
Publisher:
Release Date : 1973
Nasa Technical Note written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with categories.
An Analytical Investigation Of The Effect Of Nozzle Throat Radius Of Curvature On Gasdynamic Laser Gain
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Author : Jerry L. Wagner
language : en
Publisher:
Release Date : 1972
An Analytical Investigation Of The Effect Of Nozzle Throat Radius Of Curvature On Gasdynamic Laser Gain written by Jerry L. Wagner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Gas lasers categories.
Numerical solutions for CO2-N2 gasdynamic laser gain and maximum available power are used to examine the influence of nozzle throat radius of curvature and throat height on laser performance. Conventional gasdynamic laser nozzles incorporate minimum length supersonic contours with sharp throats in order to obtain rapid vibrational freezing of the gas. The study considers the effect of complete rounding of the throat (on both the subsonic and supersonic sides), up to a radius of cruvature equal to three throat heights. Such rounding allows easier manufacture and alignment of the nozzles, and should result in improved flow quality. The present results show a 15-percent reduction in laser gain and maximum available power due to complete rounding of the throat. (Author).
Nuclear Science Abstracts
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Author :
language : en
Publisher:
Release Date : 1976-04
Nuclear Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976-04 with Nuclear energy categories.
Population Inversions In An Expanding Gas
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Author : John David Anderson (Jr.)
language : en
Publisher:
Release Date : 1971
Population Inversions In An Expanding Gas written by John David Anderson (Jr.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Expansion of gases categories.
It is well established that population inversions between the (001) and (100) vibrational energy levels of CO2 can be created by rapid expansions of CO2-N2-H2O or He mixtures through supersonic nozzles. New experimental results are presented for such inversions. These experiments were conducted in both the 3-Megawatt Arc Tunnel and the 12.7 cm Shock Tunnel at the Naval Ordnance Laboratory. The results support previously published theoretical predictions obtained with a numerical, time-dependent, nonequilibrium nozzle flow analysis employing a simplified vibrational kinetic model. This theory is also compared with experimental data obtained by other investigators. (Author).
Vibrational Population Inversions Within Normal Shock Waves In Co2 N2 He Mixtures
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Author : John David Anderson (Jr.)
language : en
Publisher:
Release Date : 1970
Vibrational Population Inversions Within Normal Shock Waves In Co2 N2 He Mixtures written by John David Anderson (Jr.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Gas lasers categories.
Numerical solutions are given for vibrational population inversions created in CO2-N2-He mixtures due to shock wave heating of a cold gas. The results indicate that population inversions between the (040) and (001) energy levels of CO2 and, to a lesser degree, between the (200) and (001) levels, can be created in the vibrational nonequilibrium flow behind a normal shock front. The properties of these inversions as a possible laser medium are assessed; the results indicate that the laser properties of this shock-induced nonequilibrium flow are not as promising as those of lasers operating on the principle of rapid expansions. (Author).
Erda Energy Research Abstracts
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Author : United States. Energy Research and Development Administration
language : en
Publisher:
Release Date : 1976
Erda Energy Research Abstracts written by United States. Energy Research and Development Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Power resources categories.