1987
DOI: 10.2514/3.9748
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Laser-sustained plasmas in forced argon convective flow. I - Experimental studies

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Cited by 27 publications
(12 citation statements)
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“…The plasma position and size are well predicted and the behavior of the predicted plasma structure using different inlet velocity, focusing lenses, and laser power agreed well with experimental results. 3 At lower pressures, the model underpredicts the plasma size. It was recognized that the diffusion approximation for short-range thermal radiation is probably responsible.…”
Section: Discussionmentioning
confidence: 97%
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“…The plasma position and size are well predicted and the behavior of the predicted plasma structure using different inlet velocity, focusing lenses, and laser power agreed well with experimental results. 3 At lower pressures, the model underpredicts the plasma size. It was recognized that the diffusion approximation for short-range thermal radiation is probably responsible.…”
Section: Discussionmentioning
confidence: 97%
“…If the experimental results are shifted downstream by 1 mm, which is within the accuracy claimed by Welle et al, 3 the peak temperatures are located on the laser path. In this case, the model predictions agree well with the experimental LSP positions.…”
Section: Laser Power Effectmentioning
confidence: 93%
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“…15 Furthermore, at the moment of the spectrum snapshot the thermodynamic equilibrium is not valid for a maintained plasma in quiescent gas, according to the thermal equilibrium between the absorbed laser power and the losses of convection, conduction and radiation. Temperatures in the range between 15,000 to 20,000 K have been published for CO 2 laser sustained plasmas in slow streamed argon 8,10,13 at P L = 0.7 . .…”
Section: B Spectroscopic Measurementsmentioning
confidence: 98%
“…Figure 1 introduces the concept of a continuous wave laser sustained plasma in a supersonic flow, thereby continuously laser heated plasma is only investigated for laser thermal propulsion concepts in atmospheric or superatmospheric argon at slow subsonic velocities. [8][9][10] A laser sustained plasma requires an ignition to attain a sufficiently high absorption rate of the laser radiation. Afterwards the sustained plasma has to obtain the thermal equilibrium, where the total amount of absorbed laser power is equivalent to the convection, conduction and radiation losses.…”
Section: Introductionmentioning
confidence: 99%