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- W2040758240 abstract "Solutions of the binary master equations for the state populations in an expanding gas are facilitated by the use of a flow similarity variable. This similarity variable accounts for the density and velocity variation associated with a gas dynamic expansion and can be expressed as a function of the local Mach number, the stagnation conditions, and a nozzle geometry parameter. With the similarity variable, the master equations are transformed into a form which is independent of the nozzle shape and similar to those for a non-flow system. This simplification facilitates both numerical solutions and closed form approximations for populations in nozzle flow. With solutions in terms of the similarity variable the design conditions leading to a population inversion can be presented as a simple algorithm. An illustration is presented for a wedge nozzle expansion. The conditions for inversion are determined by the expansion Mach number at a stagnation pressure. With the algorithm these conditions for a range of nozzle sizes are presented as an inversion criteria curve." @default.
- W2040758240 created "2016-06-24" @default.
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- W2040758240 date "1993-05-04" @default.
- W2040758240 modified "2023-09-23" @default.
- W2040758240 title "<title>Algorithm for studying inversion in gas dynamic systems</title>" @default.
- W2040758240 doi "https://doi.org/10.1117/12.144657" @default.
- W2040758240 hasPublicationYear "1993" @default.
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