| In industrial field,we often need to distribute the two-phase flow into many branches,which include both quality and phase separation.How to ensure the average phase distribution and eliminate the phase separation has an important significance to the safety and efficient operation of the equipment.In two-phase flow system,we need to guarantee the representation of the sample fluid in order to realize the accurate measurement of two-phase flow and the safety of the equipment.Design a new type of gas-liquid two-phase distributor means a lot to the two-phase measurement and the develop of industry.The article base on the two aspects: the upstream uneven distribution environment and the downstream uneven sampling.This article bulid a method of gas-liquid two-phase flow distributor with the ― flow pattern adjustment ‖ and ― uniform sampling ‖ combination.The article design a new slit type distributor,which consists of a swirl vane,18 slots,main fluid collecting room and sampling fluid collecting room.After the experimental tests of three flow pattern adjustment device,we choose swirl vane adjust the upstream flow to uniform annular flow pattern,and ensure that gas-liquid two-phase flow can be divided into 18 portion.We select 3 slots evenly distributed among 18 slots to collect sampling fluid,and arrange pressure adjusting device between sampling fluid collecting room and mainstream fluid collecting room in order to guarantee the same pressure environment.Through mass flow rate measurement of sampling fluid,we can get the distribution coefficient and operation characteristic of the distributor.This article mainly uses the method of FLUNT numerical simulation and experimental study.A numerical model was developed to optimize the slot structure,simulate the flow pattern adjustment device in the distributor.The simulation qualitative studied how different rectification device influence the two-phase flow liquid film distribution under the same gas and liquid flow rate,and the separation effect of separator was studied.The experiment mainly includes the following items: Firstly,test on the gas-liquid separator for the separation of sampling measurement to evaluate the performance of the separator,the superficial gas velocity varied from 1.00 to 16.00 m/s,the liquid superficial velocity was in the range of 0.01 to 0.22 m/s.Secondly,selection of three different structure adjustment device,choose the best rectifying effect of vane,the superficial gas velocity varied from 1.00 to 25.00 m/s,the liquid superficial velocity was in the range of 0.01 to 0.50 m/s.Thirdly,Experimental research on the new distributor,investigation on the influence factor of gas and liquid extraction ratio and distribution of dryness,such as inlet gas and liquid flow rate and flow pattern,the superficial gas velocity varied from 2.50 to 20.00 m/s,the liquid superficial velocity was in the range of 0.03 to 0.25m/s.The experimental results show that,under the condition of above,tube type gas-liquid separator has perfect separation efficiency,and it is not affected by flow pattern,gas and liquid velocity etc.The separate error is within 2.5%.The extraction ratio is only dependent on the ratio of sample fluid slot number to the total dividing slot number and independent of inlet flow patterns,gas and liquid superficial velocity.Gas and liquid extraction ratio of this new distributor is about 0.167,and gas-liquid phase measurement error is less than + /-5%... |
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