An Analytical Investigation of the Effect of Nozzle Throat Radius of Curvature on Gasdynamic Laser Gain PDF Download
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Author: Jerry L. Wagner
Publisher:
ISBN:
Category : Gas lasers
Languages : en
Pages : 70
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Book Description
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).
Author: Jerry L. Wagner
Publisher:
ISBN:
Category : Gas lasers
Languages : en
Pages : 70
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Book Description
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).
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 680
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Book Description
Author: Jerry L. Wagner
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
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).
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 568
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Author:
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ISBN:
Category :
Languages : en
Pages : 480
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 232
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Author:
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 634
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Book Description
References and abstracts to international literature (mostly journal articles). Classified arrangement. Subject, author, and source indexes. Ser. 1, 1974: 8256 references.
Author:
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 542
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Book Description
Author: Donald M. Kuehn
Publisher:
ISBN:
Category : Carbon dioxide lasers
Languages : en
Pages : 28
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Book Description
A carbon dioxide gasdynamic laser was operated over a range of reservoir pressure and temperature, test-gas mixture, and nozzle geometry. A significant result is the dominant influence of nozzle geometry on laser power at high pressure. High reservoir pressure can be effectively utilized to increase laser power if nozzle geometry is chosen to efficiently freeze the test gas. Maximum power density increased from 3.3 W/cu cm of optical cavity volume for an inefficient nozzle to 83.4 W/cu cm at 115 atm for a more efficient nozzle. Variation in the composition of the test gas also caused large changes in laser power output. Most notable is the influence of the catalyst (helium or water vapor) that was used to depopulate the lower vibrational state of the carbon dioxide. Water caused an extreme deterioration of laser power at high pressure (100 atm), whereas, at low pressure the laser for the two catalysts approached similar values. It appears that at high pressure the depopulation of the upper laser level of the carbon dioxide by the water predominates over the lower state depopulation, thus destroying the inversion.
Author:
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ISBN:
Category : Fluid dynamics
Languages : en
Pages : 624
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Book Description
