Evaluation of Supersonic Turbulent Mixing Using Catalytic Combustion of Constant Temperature Pt Wire.

Arai, T.; Nagata, Harunori; Endo, Akira; Sugiyama, Hiromu; Morita, Shuji; Hosokawa, Hiroshi

doi:10.1299/jsmeb.42.65

Cited by 5 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, even if there were differences between the resistance of Pt and Ni wires, namely, the temperatures of these wires, heat release due to catalytic reaction remained invariable. 11) Therefore, this calibration (subtracting) was valid. 3.5.…”

Section: Pitot Pressure Measurementsmentioning

confidence: 96%

“…We have developed a new mixing condition evaluation method as described in our previous papers. 4,6,[10][11][12][13][14][15] It was conducted by using a catalytic reaction on a platinum wire. In the previous studies, it was used to quantitatively inves-Ó 2004 The Japan Society for Aeronautical and Space Sciences tigate the mixing condition of a two-dimensional hydrogenair supersonic mixing layer.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mixing of a Hydrogen Jet from a Wedge Shaped Injector into a Supersonic Cross Flow

Sakima

Arai²,

Kasahara³

et al. 2004

Trans. Japan Soc. Aero. S Sci.

Self Cite

View full text Add to dashboard Cite

A new measurement by using a catalytic reaction on a platinum wire was conducted spatially to evaluate a mixing condition in a supersonic flow field. A spatial mixing field was created by a transverse hydrogen jet injected into a cold supersonic cross flow (Mach 1.81) through a wedge shaped injector. The half-vertical angles of 8 or 18 were chosen as that of the wedge shaped injector. These results were compared with that of a circular injector case. The results showed that this method could evaluate a spatial mixing condition. The results also clarified that a jet plume in the cases of wedge injectors penetrated higher than that of the circular injector case and separate from the lower wall when going downstream. To observe jet/supersonic flow interaction, Schlieren visualization and oil flow visualization were carried out. It was shown that the extent of the separation region around the 8 wedge injector was the smallest among those injectors. Pitot pressure measurements were also conducted. These indicated that a wedge injector scheme was more beneficial than that of a circular injector for the supersonic combustion and combustor wall cooling.

show abstract

Section: Pitot Pressure Measurementsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Mixing of a Hydrogen Jet from a Wedge Shaped Injector into a Supersonic Cross Flow

Sakima

Arai²,

Kasahara³

et al. 2004

Trans. Japan Soc. Aero. S Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…3,7,[11][12][13][14][15][16][17] We used it to investigate the timeaveraged mixing conditions of the 2-D hydrogen-air supersonic mixing layer in previous studies. 15,16) We clarified that…”

Section: Introductionmentioning

confidence: 99%

Correlation between Mass Flux Fluctuation and Fluctuation of Hydrogen Concentration in 2-D Air-Hydrogen Supersonic Mixing Layer

Sakima

Arai²,

Edward

et al. 2005

Trans. Japan Soc. Aero. S Sci.

Self Cite

View full text Add to dashboard Cite

An experiment was carried out to confirm the validity of time series evaluation of supersonic mixing conditions by using the catalytic reaction on a platinum wire. Gaseous hydrogen was injected parallel to a supersonic freestream (M 1 % 1:81) from a slit injector, located at a backward-facing step. The time series condition of supersonic mixing was evaluated using a W-type probe with a platinum wire and a reference (nickel) wire. The evaluation was done by simultaneously measuring each electric power supplied by each electric circuit keeping the temperature of the wire constant. Electric power supplied to the Pt wire depended on the catalytic heat release rate (giving hydrogen concentration) and flow convection. Meanwhile electric power supplied to the Ni wire depended on flow convection. The results show that the correlation coefficient between these electric powers increased as mixing developed. Investigations were also conducted for the cases of helium, air, and no secondary injectant to compare with the hydrogen-injectant case. The results indicate that this evaluation method can measure the time-series behavior of the air-hydrogen supersonic mixing layer or coherent motion of turbulence.

show abstract

Evaluation of mass transfer coefficient and hydrogen concentration in supersonic flow by using catalytic reaction

Nagata

Sasaki

Arai³

et al. 2000

Proceedings of the Combustion Institute

View full text Add to dashboard Cite

Evaluation of Supersonic Turbulent Mixing Using Catalytic Combustion of Constant Temperature Pt Wire.

Cited by 5 publications

References 7 publications

Mixing of a Hydrogen Jet from a Wedge Shaped Injector into a Supersonic Cross Flow

Mixing of a Hydrogen Jet from a Wedge Shaped Injector into a Supersonic Cross Flow

Correlation between Mass Flux Fluctuation and Fluctuation of Hydrogen Concentration in 2-D Air-Hydrogen Supersonic Mixing Layer

Evaluation of mass transfer coefficient and hydrogen concentration in supersonic flow by using catalytic reaction

Contact Info

Product

Resources

About