罗小平,许静姝,杨书斌,李景生,张超勇

• 1:华南理工大学机械与汽车工程学院

摘要(Abstract)：

为研究电场与声场对微细通道压降和总体传热性能的影响，以制冷剂一氟二氯乙烷R141b为实验工质，对比并分析无外场、单独电场、单独声场、两场同时作用下的两相压降变化及影响。结合功率谱密度(PSD)和可视化，研究电场与声场作用下两相压降频域特性和气泡运动状态。采用Webb-Bergles方法研究不同外场作用下的微细通道强化传热综合性能。结果表明：在本实验工况下，电场电压越大、超声波频率越小、功率越大，两相压降越大；电场、声场的作用，能够加剧通道内气泡运动，降低气泡长径比；通过强化传热综合性能评价发现，电场和声场同时作用下强化传热综合性能最高，最高可达1.78。该研究结果可从多外场强化传热技术角度为微细通道换热提供新思路。

关键词(KeyWords)： 微细通道;超声波场;电场;压降;功率谱密度;可视化;强化传热综合性能评价

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(22178118);; 广东省自然科学基金(2019A1515011053)

作者(Author): 罗小平,许静姝,杨书斌,李景生,张超勇

参考文献(References)：

• [1] KOSTYANTYN R P, BIREE A, GEORGE L. Microfluidic experimental setup for adhesion and recovery measurements of red blood cells in sickle cell disease[J]. Journal of the Mechanical Behavior of Biomedical Materials, 2017, 71:80-84.
• [2] KROMER D, GARIMELLA S, CHANDRASEKARAN S. Experimental investigation and modeling of flow boiling in microchannel heat exchangers for integral steam generator applications[J]. Nuclear Engineering and Design, 2021, 372(3):111001.
• [3] OH S H, LEE S H, LEE D C, et al. Air-side heat transfer and pressure drop characteristics of flat-type, U-and V-shaped microchannel condensers for refrigerator applications[J]. International Journal of Heat and Mass Transfer, 2021, 176:121460.
• [4]董正亚,陈光文,赵帅南,等.声化学微反应器——超声和微反应器协同强化[J].化工学报, 2018, 69(1):102-115.DONG Z Y, CHEN G W, ZHAO S N, et al. Sonochemical microreactor--synergistic strengthening of ultrasound and microreactor[J]. CIESC Journal, 2018, 69(1):102-115.
• [5] KOCKMANN D. Transport phenomena in micro process engineering[M]. Berlin, Heidelberg:Springer, 2008.
• [6] POE S L, CUMMINGS M A, HAAF M P, et al. Solving the clogging problem:Precipitate-forming reactions in flow[J].Angewandte Chemie-International Edition, 2006, 45(10):1544-1548.
• [7] STANKIEWIC Z, ANDRZE J. On the applications of alternative energy forms and transfer mechanisms in microprocessing systems[J]. Industrial&Engineering Chemistry Research, 2014, 46(12):4232-4235.
• [8] QIU C X, ZHOU W X, LONG L, et al. Forced convection heat transfer of aviation kerosene enhanced by electric field in a circular channel[J]. Applied Thermal Engineering, 2021, 197:117333.
• [9] DONG Z Y, YAO C Q, ZHANG X L, et al. A high-power ultrasonic microreactor and its application in gas-liquid mass transfer intensification[J]. Lab on a chip, 2015, 15(4):1145-52.
• [10] LI Y H, JAIN M, MA Y T, et al. Control of the breakup process of viscous droplets by an external electric field inside a microfluidic device[J]. Soft Matter, 2015, 11(19):3884-99.
• [11] MANICKAM S, SIVAKUMAR K, PANG C H. Investigations on the generation of oil-in-water(O/W)nanoemulsions through the combination of ultrasound and microchannel[J]. Ultrasonics Sonochemistry, 2020, 69:105258-105258.
• [12] JOHN J J, KUHN S, BRAEKEN L, et al. Ultrasound assisted liquid-liquid extraction in microchannels-A direct contact method[J].Chemical Engineering&Processing, 2016, 102:37-46.
• [13]段希利,王选盈,王刚,等.超声振动对换热器管内传热和压降影响[J].石油化工设备, 2004, 33(1):1-4.DUAN X L, WANG X Y, WANG G, et al. Effect of ultrasonic vibration on heat transfer and pressure drop in heat exchanger tubes[J].Petrochemical Equipment, 2004, 33(1):1-4.
• [14] DELOUEI A A, SAJJADI H, IZADI M, et al. The simultaneous effects of nanoparticles and ultrasonic vibration on inlet turbulent flow:An experimental study[J]. Applied Thermal Engineering, 2018, 146:268-277.
• [15] DELOUEI A A, SAJJADI H, MOHEBBI R, et al. Experimental study on inlet turbulent flow under ultrasonic vibration:Pressure drop and heat transfer enhancement[J]. Ultrasonics Sonochemistry, 2018, 51:151-159.
• [16]刘丰良.电场/脉动流混合强化传热换热器的流动与传热特性研究[D].武汉:武汉工程大学, 2013.LIU F L. Study on flow and heat transfer characteristics of electric field/pulsating flow hybrid enhanced heat exchanger[D]. Wuhan:Wuhan University of Engineering, 2013.
• [17] YIN S, HUANG Y, WONG T N, et al. Dynamics of droplet in flow-focusing microchannel under AC electric fields[J].International Journal of Multiphase Flow, 2020, 125:103212-103212.
• [18] HE W, KANG X, YU B, et al. Effect of electric field on droplets extraction in ultrasonic electric propulsion system[J]. Acta Astronautica, 2019, 160:36-45.
• [19] TANG Y, CHEN C, ZHANG S W, et al. Effects of structural parameter on flow boiling performance of interconnected microchannel net[J]. Applied Thermal Engineering, 2017, 112(5):164-173.
• [20] DENG D X, XIE Y L, HUANG Q S, et al. On the flow boiling enhancement in interconnected reentrant microchannels[J].International Journal of Heat and Mass Transfer, 2017, 108:453-467.
• [21] WANG G, CHENG P, BERGLES A E. Effects of inlet/outlet configurations on flow boiling instability in parallel microcha nnels[J].International Journal of Heat and Mass Transfer, 2008, 51(9/10):2267-228.
• [22] LEE H, PARK I, MUDAWAR I, et al. Micro-channel evaporator for space applications–1. Experimental pressure drop and heat transfer results for different orientations in earth gravity[J]. International Journal of Heat&Mass Transfer, 2014, 77:1213-1230.
• [23] MOFAT R J. Describing the uncertainties in experimental results[J]. Experimental Thermal and Fluid Science, 1988, 1(1):3-17.
• [24]沙定国.误差分析与测量不确定度评定[M].北京:中国计量出版社, 2003:98-115.SHA D G. Error analysis and evaluation of measurement uncertainty[M]. Beijing:China Metrology Press, 2003:98-115.
• [25]周云龙,张学清,何强勇.多尺度信息熵特征的气液二相流流型识别方法[J].化学工程, 2009, 37(10):32-35.ZHOU Y L, ZHANG X Q, HE Q Y. Flow pattern identification method of gas-liquid two-phase flow based on multi-scale information entropy characteristics[J]. Chemical Engineering, 2009, 37(10):32-35.
• [26]周云龙,曹茹.水平管泡状流压力信号的功率谱特性比较[J].化学工程, 2011, 39(2):43-46.ZHOU Y L, CAO R. Comparison of power spectrum characteristics of pressure signals in horizontal pipe bubbly flow[J]. Chemical Engineering, 2011, 39(2):43-46.
• [27]宋爱国,刘文波,王爱民.测试信号分析与处理[M].北京:机械工业出版社, 2006.SONG A G, LIU W B, WANG A M. Test signal analysis and processing[M]. Beijing:China Machine Press, 2006.
• [28] WEBB R L. Performance evaluation criteria for use of enhanced heat transfer surfaces in heat exchanger design[J]. International Journal of Heat and Mass Transfer, 1981, 24(4):715-726.