| Experimental Investigation of Spray Evaporation in Turbulent Flow in Countercurrent Humidifier |
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| 作者姓名： | 王玉璋 刘永文 翁史烈 |
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| 作者单位： | Key Lab. for Power Machinery and Eng. of the Ministry of Education，Shanghai Jiaotong Univ.，Key Lab. for Power Machinery and Eng. of the Ministry of Education，Shanghai Jiaotong Univ.，Key Lab. for Power Machinery and Eng. of the Ministry of Education，Shanghai Jiaotong Univ. Shanghai 200030，China，Shanghai 200030，China，Shanghai 200030，China |
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| 基金项目： | 973 Key Develop Projectof the Ministry ofScience and Technology of China (No.G19990 2 2 3 0 3 ) |
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| 摘 要： | IntroductionThe HAT( humid air turbine) cycle is an ad-vanced power generation system with high efficien-cy,low cost,high specific power,excellentoff- de-sign performance and low NOx emissions withoutcomplex system introduction.It has aroused con-siderable interest,and is predicted as an advancedthermal power cycle for this century1] .The proto-type of modern HAT cycle was proposed by Morietal.,and gotmuch progress recently.HAT cycleuses a working fluid of air,water and steam mix-ture,an…
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| 关 键 词： | 湍流 多普勒相位风速计 液滴速度 液滴尺寸 增湿器 |
Experimental Investigation of Spray Evaporation in Turbulent Flow in Countercurrent Humidifier |
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| WANG Yu-zhang ,LIU Yong-wen,WENG Shi-lie.Experimental Investigation of Spray Evaporation in Turbulent Flow in Countercurrent Humidifier[J].Journal of Shanghai Jiaotong university,2004,9(1):19-25. |
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| Authors: | WANG Yu-zhang LIU Yong-wen WENG Shi-lie |
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| Institution: | Key Lab.for Power Machinery and Eng.of the Ministry of Education，Shanghai Jiaotong Univ.,Shanghai 200030,China |
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| Abstract: | The process in the countercurrent humidifier of HAT cycle involves the evaporation of atomized liquids in a turbulent environment. To allow an optimization of such process and provide data for the validation of numerical calculation, the spray evaporation in a countercurrent air stream was studied experimentally. Measurements were taken for different flow parameters, such as airflow rate and liquid flow rate in order to provide reliable data. Phase-Doppler anemometry (PDA) was applied to obtain the spatial change of the droplet size spectrum in the flow field and to measure droplet size-velocity correlations. These local measured profiles of droplet mean velocities, velocity fluctuations and droplet mean diameters were obtained by averaging over all droplet size classes. Moreover, DualPDA signal processing allows accurate determination of the droplet mass flux and local concentration, from which the global evaporation rates could also be determined. These local temperature profiles were measured using the thermocouple and acquired by data acquisition system based on virtual instrument (VI) technology. |
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| Keywords: | spray phase-Doppler anemometer (PDA) turbulence evaporation droplet velocity droplet size humidifier |
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