tailieunhanh - Shock adiabat analysis for the mixture of liquid and gas of two components

In the paper, the investigation results of shock waves, propagated in the liquid and two-component gas (one component is neutral, the other is condensed) mixture, are presented. The influence of the relative gas ratios, initial gas volume, wave intensity etc. on the main wave characteristics, is analyzed and illustrated as examples for two mixtures. The first is a mixture of water and gas (air and water vapour). | Vietnam Journal of Mechanics, NCST of Vietnam Vol. 22, 2000, No 2 (101 - 110) SHOCK ADIABAT ANALYSIS FOR THE MIXTURE OF LIQUID AND GAS OF TWO COMPONENTS DUONG NGOC HAI Institute of Mechani"cs, NCST of Vietnam NGUYEN VAN TUAN Technical Industrial Universi'ty of Thai Nguyen ABSTRACT. The liquid and gas mixture is met in many natural and industrial pro~ cesses. In the paper, the investigation results of shock waves, propagated in the liquid and two-component gas (one component is neutral, the other is condensed) mixture, are presented. The influence of the relative gas ratios , initial gas volume, wave intensity etc. on the main wave characteristics, is analyzed and illustrated as examples for two mixtures. The first is a mixture of water and gas (air and water vapour) . The second is a mixture of crude oil and gas (one component is soluble, the other is insoluble). 1. Introduction A heterogeneous medium is supposed to be a two-phase one: a liquid phase and a gas phase, in which the gas phase consists of two components , one of which is neutral (non-condensable, insoluble) gas and the other is vapour (or soluble gas) . This medium can be seen in the following fields: - In the energy industry, this medium is used as a heat carrying medium. - In the oil exploitation, transportation and processing industry, gas·appears when there are changes of pressure and temperature, because crude oil is normally a mixture of various components in which CH 4 , C 2 H 6 , ••• evaporate easily at a normal temperature and pressure. Besides this kind of a mixture can also be seen in chemical engineering and natural processes [1-3]. Shock waves in liquid with bubbles of an insoluble and non-condensable gas have been investigated theoretically and by Nigmatulin, Khabeev and Shagapov (1974); Nigmatulin and Shagapov (1974); Aidagulov, Khabeev and Shagapov (1977). Shock waves in liquid with bubbles of easily soluble gas have been investigated theoretically and .