Structure of an evaporating flow inside a heated porous metal

Results are presented from an experimental study of the structure of an effluent two-phase flow and the temperature field on the external surface of a porous metal, with volume heat release during evaporative cooling by the liquid.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 41, No. 6, pp. 965–969, December, 1981.     

Intensification of convective heat transfer in channels with a porous high-thermal-conductivity filler II. Forced heat-transfer regime

Results are presented from an analytical study of intensification of convective single-phase heat transfer in a channel with a porous high-thermal-conductivity filler in the case of intensive external heating.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 47, No. 2, pp. 199–205, August, 1984.     

Extraction of thorium with tributyl phosphate from chloride solutions

Thorium distribution was studied in relation to concentration of Th, HCl, and metal chloride in aqueous solutions, the nature of the diluent, and the tributyl phosphate concentration in the extractant. Thorium extraction from salt solutions increases in the order NaCl < CaCl₂ < AlCl₃. The fact that introduction of up to 30% of benzene or dodecane into tributyl phosphate has virtually no effect on the Th extraction is important for industrial application. The results obtained are discussed.     

Physical features of the evaporative liquid cooling of a porous metal-ceramic fuel element

This article compares calculated data with results of an experimental study of the temperature field of a porous metal-ceramic fuel element during its evaporative liquid cooling and reports physical features of this process.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 46, No. 2, pp. 189–195, February, 1984.     

In situ combustion measurements of CO with diode-laser absorption near 2.3 microm

In situ measurements of CO concentration were recorded with tunable diode-laser absorption spectroscopy techniques in both the exhaust and the immediate post-flame regions of an atmospheric-pressure flat-flame burner operating on ethylene air. Two room-temperature cw single-mode InGaAsSb/AlGaAsSb diode lasers operating near 2.3 microm were tuned over individual transitions in the CO first overtone band (v' = 2 <-- v" = 0) to record high-resolution absorption line shapes in the exhaust duct [79 cm above the burner, approximately 470 K; R(15) transition at 4311.96 cm(-1)] and the immediate postflame zone [1.5 cm above the burner, 1820-1975 K; R(30) transition at 4343.81 cm(-1)]. The CO concentration was determined from the measured absorption and the gas temperature, which was monitored with type-S thermocouples. For measurements in the exhaust duct, the noise-equivalent absorbance was approximately 3 x 10(-5) (50-kHz detection bandwidth, 50-sweep average, 0.1-s total measurement time), which corresponds to a CO detection limit of 1.5 ppm m at 470 K. Wavelength modulation spectroscopy techniques were used to improve the detection limit in the exhaust to approximately 0.1 ppm m (approximately 500-Hz detection bandwidth, 20-sweep average, 0.4-s total measurement time). For measurements in the immediate postflame zone, the measured CO concentrations in the fuel-rich flames were in good agreement with chemical equilibrium predictions. These experiments demonstrate the utility of diode-laser absorption sensors operating near 2.3 microm for in situ combustion emission monitoring and combustion diagnostics.