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The 12～(th) International Conference on flow Measurement

作者： Su Feng Zhang Tao School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

＜正＞ On the basis of analyzing flow equation for rotameter, using the flow standard device with master meter method, the rotameter with one type of floater chosen from two different floaters in shape and metal tube from 25mm caliber to 100mm caliber had been calibrated. After calculating and analyzing curve between flow coefficient and Reynolds Number （α-Re ） of metal rotameter, some laws are founded. Within the upper limit flow rate of metal rotameter, flow coefficient does not tend towards a constant number. Under the double logarithmic coordinate, relation curve of large capacity metal rotameter between flow coefficient and Reynolds Number （α-Re） is near to linearity, and the approximate expression reflecting this kind of relationship is deduced.

关键词： metal rotameter flow equation flow coefficient Reynolds number

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Experimental Study on the flow Characteristics of a Plate with a Mechanically Choked Orifice

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Fluid Dynamics & Materials Processing 2021年第1期17卷 97-107页

作者： Ming Liu Xingkai Zhang Dong Wang State Key Laboratory of Multiphase flow in Power Engineering Xi’an Jiaotong UniversityXi’an710049China Petroleum Engineering Technology Research Institute of Shengli Oilfield Company SINOPECDongying257000China Shandong Key Laboratory of Heavy Oil Production Technology Shengli Oilfield CompanySINOPECDongying257000China Petroleum Engineering College Yangtze UniversityWuhan430100China

The mechanically choked orifice plate (MCOP) is a new type of device for flow control by which choking conditionsfor incompressible fluids can be obtained with relatively small pressure losses. Given the lack of relevant results anddata in the literature, in the present study, we concentrate on the experimental determination of the flow coefficientfor the annular orifice, the pressure distribution in the MCOP, and the characteristics of the choked flow itself. Asconfirmed by the experimental results, the Reynolds number, the orifice plate thickness, the plug taper, and theeccentricity have an obvious influence on the aforementioned flow coefficient. The pressure drop in the MCOPis mainly generated near the orifice plate, and the pressure upstream of the orifice plate is slightly reduced in theflow direction, while the pressure downstream of the orifice plate displays a recovery trend. The choked flow rateof the MCOP can be adjusted by replacing the spring with a maximum flow control deviation of 4.91%.

关键词： Mechanical choked orifice plate flow control flow coefficient flow characteristics

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A Laboratory Investigation into the Fuel Atomization Process in a Diesel Engine for Different Configurations of the Injector Nozzles and flow Conditions

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Fluid Dynamics & Materials Processing 2020年第4期16卷 747-760页

作者： Mikhail G.Shatrov Valery I.Malchuk Andrey Y.Dunin Ishlinsky Institute for Problems in Mechanics RAS Moscow119526Russia Moscow Automobile and Road Construction State Technical University(MADI) Moscow125319Russia

This paper reports a laboratory investigation of the fuel injection process in a diesel engine.The atomization process of the considered fuel(a hydrocarbon liquid)and the ensuing mixing with air is studied experimentally under high-pressure conditions.Different types of injector nozzles are examined,including(two)new configurations,which are compared in terms of performances to a standard injector manufactured by the Bosch company.For the two alternate configurations,the intake edges of one atomizing hole(hole No.1)are located in the sack volume while for the other(hole No.2)they are located on the locking cone of the needle valve.The injection process,the fuel atomization fineness and fuel supply speed characteristics are studied as functions of high-pressure fuel pump camshaft speed and rotation angle.The results obtained show that a decrease in the high-pressure fuel pump camshaft speed can produce fuel redistribution depending on the injector operation.In general,however,the hole No.1 can ensure fuel flow with higher speed with respect to the hole No.2 for all the operation modes of the injector.Based on such an analysis,we conclude that the use of certain injectors can enable a fine tuning of the propagation process of fuel sprays into various areas of the diesel engine combustion chamber.

关键词： Injection atomization injector nozzle channel injection characteristic flow coefficient

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EXPERIMENTAL STUDY ON flow PROPERTY OF DISCHARGE PORT IN SCROLL COMPRESSOR

EXPERIMENTAL STUDY ON FLOW PROPERTY OF DISCHARGE PORT IN SCR...

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第三届国际压缩机技术会议

作者： Shiyu FENG XiufengGAO Xiaobo GONG Zhaolin GU Yongzhang YUEnvironmental and Chemical Engineering School of Xi’an Jiaotong Univesity Xi’an City 710049 P.R.China Telephone: +86 (29) 2674953 Fax: +86 (29) 3237910 Email: shiyuf@126.comYundong HUANGChangzhou Ranco Reversing Valve Co. Ltd. Telepnone: +86 (519) 5718008 Fax: +86 (519) 5718052

＜正＞Experimental method of the flow property of dis charge port in scroll compress is expounded in this paper. Whole experimental scheme and measure a e presented. A set of experimental facility is built to study some kinds of discharge ports that are actually applied in scroll compressors and an experiential equation to forecast the relation between flow coefficient and rotating angle is derived from the data.

关键词： scroll compressor discharge port flow coefficient

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