Characteristics and Sound Speed in Nonisentropic Gas Flows With Nonequilibrium Thermodynamic States

E. L. RESLER

doi:10.2514/8.3971

Characteristics and Sound Speed in Nonisentropic Gas Flows With Nonequilibrium Thermodynamic States

Journal of the Aeronautical Sciences (Institute of the Aeronautical Sciences) ◽

10.2514/8.3971 ◽

1957 ◽

Vol 24 (11) ◽

pp. 785-790 ◽

Cited By ~ 16

Author(s):

E. L. RESLER

Keyword(s):

Sound Speed ◽

Nonequilibrium Thermodynamic ◽

Gas Flows

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Acoustic waves in gas flows with sound speed discontinuities

Journal of Sound and Vibration ◽

10.1016/j.jsv.2019.115154 ◽

2020 ◽

Vol 469 ◽

pp. 115154

Author(s):

Eduard Amromin

Keyword(s):

Acoustic Waves ◽

Sound Speed ◽

Gas Flows

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In Situ Observation of Catalyzed Gasification of Graphite by Nickel

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100097090 ◽

1981 ◽

Vol 39 ◽

pp. 76-77

Author(s):

R. T. K. Baker ◽

R. D. Sherwood

Keyword(s):

Objective Lens ◽

In Situ Observation ◽

Gas Flows ◽

Catalytic Gasification ◽

Television Camera ◽

Viewing Screen ◽

Fuels And Chemicals ◽

Gasification Of Carbon ◽

Transmission Microscope

The catalytic gasification of carbon at high temperature by microscopic size metal particles is of fundamental importance to removal of coke deposits and conversion of refractory hydrocarbons into fuels and chemicals. The reaction of metal/carbon/gas systems can be observed by controlled atmosphere electron microscopy (CAEM) in an 100 KV conventional transmission microscope. In the JEOL gas reaction stage model AGl (Fig. 1) the specimen is positioned over a hole, 200μm diameter, in a platinum heater strip, and is interposed between two apertures, 75μm diameter. The control gas flows across the specimen and exits through these apertures into the specimen chamber. The gas is further confined by two apertures, one in the condenser and one in the objective lens pole pieces, and removed by an auxiliary vacuum pump. The reaction zone is <1 mm thick and is maintained at gas pressure up to 400 Torr and temperature up to 1300<C as measured by a Pt-Pt/Rh 13% thermocouple. Reaction events are observed and recorded on videotape by using a Philips phosphor-television camera located below a hole in the center of the viewing screen. The overall resolution is greater than 2.5 nm.

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