One-dimensional modeling of the gain and temperature in asupersonic chemical oxygen-iodine laser with transonic injection ofiodine

A simple 1-D model is developed for the fluid dynamics and chemical kinetics in the chemical oxygen iodine laser (COIL). Two different I₂ dissociation mechanisms are tested against the performance of a COIL device in our laboratory. The two dissociation mechanisms chosen are the celebrated mechanism of Heidner (1983) and the newly suggested mechanism of Heaven (2001). The gain calculated using Heaven's dissociation mechanism is much lower than the measured one. Employing Heidner's mechanism, a surprisingly good agreement is obtained between the measured and calculated gain and temperature over a wide range of the flow parameters. Other predictions of the model (larger mixing efficiency and higher temperature with a leak opened downstream of the resonator and gain decrease along the flow) are also in agreement with the experimental observations     

Rapid liquid chromatography of oils in the production of sulfonated additives

Chemistry and Technology of Fuels and Oils -     

Experimental test of directional hydraulic fracturing technique

The article reports the data of a lab test of directional hydraulic fracturing carried out on a block made of organic glass. A fracture across a hole is created by means of additional shearing stress applied to the hole walls within the interval of the fracture. It is found that seismic emission under hydraulic fracturing appears after the fracture completion.