發(fā)布時(shí)間：2018-01-07 13:26

  本文關(guān)鍵詞：純電動(dòng)公交車內(nèi)氣流分布特性及熱舒適性研究　出處：《西南交通大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 純電動(dòng)公交車 熱負(fù)荷 氣流組織 熱舒適性 優(yōu)化設(shè)計(jì)

【摘要】：為了應(yīng)對(duì)能源短缺和環(huán)境污染問(wèn)題,在交通領(lǐng)域我國(guó)正大力發(fā)展新能源城市公交車。人們?cè)诠�交車�?nèi)度過(guò)的時(shí)間越來(lái)越多,車廂內(nèi)的舒適性也成為人們?nèi)找骊P(guān)注的問(wèn)題。熱舒適性直接影響著司機(jī)和乘客的身心健康,同時(shí)影響著行車安全性和燃油經(jīng)濟(jì)性。所以,車廂內(nèi)熱舒適性研究越來(lái)越受到汽車公司的重視。現(xiàn)階段,車廂內(nèi)熱舒適性的研究主要有試驗(yàn)和數(shù)值模擬兩種方法。為縮短開發(fā)周期,降低成本,計(jì)算流體動(dòng)力學(xué)(CFD,Computational Fluid Dynamics)方法在汽車設(shè)計(jì)開發(fā)過(guò)程中應(yīng)用廣泛。本文采用CFD方法研究車廂內(nèi)氣流組織分布和人員的熱舒適性,計(jì)算結(jié)果為提高純電動(dòng)公交車的熱舒適性、降低空調(diào)系統(tǒng)能耗和優(yōu)化空調(diào)系統(tǒng)設(shè)計(jì)提供了依據(jù)。根據(jù)研究車型CDK6850CBEV的車身結(jié)構(gòu)和物性參數(shù),建立了穩(wěn)態(tài)情況下的熱負(fù)荷模型。運(yùn)用MATLAB編寫了熱負(fù)荷計(jì)算程序,通過(guò)改變各種參數(shù)分析其對(duì)車廂熱負(fù)荷的影響,提出降低整車熱負(fù)荷的方法。通過(guò)ICEM建立了合理簡(jiǎn)化的公交車車廂內(nèi)部三維模型。對(duì)網(wǎng)格無(wú)關(guān)性和湍流方程的選擇進(jìn)行了研究,確定選用Realizable k-ε模型。對(duì)車廂內(nèi)速度場(chǎng)和溫度場(chǎng)進(jìn)行了測(cè)定實(shí)驗(yàn),通過(guò)仿真結(jié)果和實(shí)驗(yàn)數(shù)據(jù)對(duì)比,吻合較好,驗(yàn)證了數(shù)值模擬的可靠性。用FLUNT軟件對(duì)比計(jì)算了車廂內(nèi)空載、滿座和滿座三種模型,對(duì)比計(jì)算了滿座模型下十種不同送風(fēng)參數(shù)工況。在結(jié)果分析時(shí),應(yīng)用Tecplot軟件提取了大量典型截面的速度場(chǎng)和溫度場(chǎng)分布圖,以及某些特征點(diǎn)溫度和速度沿車廂高度(Z軸)方向的數(shù)據(jù)。最后對(duì)結(jié)果進(jìn)行對(duì)比,定性分析乘客數(shù)量和送風(fēng)參數(shù)對(duì)車廂內(nèi)氣流組織和熱舒適性的影響。調(diào)取FLUENT軟件計(jì)算結(jié)果,并對(duì)其進(jìn)行統(tǒng)計(jì)分析處理。選取車廂內(nèi)幾個(gè)典型截面,用不均勻系數(shù)法和空氣擴(kuò)散性能指數(shù)(ADPI)評(píng)價(jià)氣流組織好壞;選取車廂內(nèi)不同座位的人員,用當(dāng)量溫度(EQT)評(píng)價(jià)人體的熱舒適性,用能量利用系數(shù)(投入能量利用系數(shù))對(duì)公交車空調(diào)系統(tǒng)進(jìn)行經(jīng)濟(jì)評(píng)價(jià)。最后,根據(jù)之前的分析結(jié)果,在保證送風(fēng)參數(shù)(送風(fēng)熱量)不變的前提下,對(duì)公交車空調(diào)通風(fēng)系統(tǒng)進(jìn)行優(yōu)化設(shè)計(jì),主要是通過(guò)改變車玻璃材料、回風(fēng)口布置和送回風(fēng)方式。設(shè)計(jì)了多溫區(qū)獨(dú)立控制空調(diào)系統(tǒng),使車廂內(nèi)的熱舒適性得到了很大的改善。
[Abstract]:In order to deal with the problem of energy shortage and environmental pollution, China is vigorously developing new energy city buses in the field of transportation. People spend more and more time in buses. Thermal comfort directly affects the physical and mental health of drivers and passengers as well as safety and fuel economy. More and more attention has been paid to the study of thermal comfort in cars. At present, the research of thermal comfort in cars mainly includes two methods: test and numerical simulation, in order to shorten the development period and reduce the cost. Computational fluid dynamics (CFD). Computational Fluid dynamics). The method is widely used in automobile design and development. In this paper, CFD method is used to study the distribution of airflow and the thermal comfort of persons. The results provide the basis for improving the thermal comfort of the pure electric bus, reducing the energy consumption of the air conditioning system and optimizing the design of the air conditioning system. According to the study of the body structure and physical parameters of the vehicle CDK6850CBEV. The model of heat load under steady state is established, and the calculation program of heat load is compiled by MATLAB. The influence of various parameters on the thermal load of carriage is analyzed by changing all kinds of parameters. This paper presents a method to reduce the heat load of the whole vehicle. Through ICEM, a reasonably simplified three-dimensional model of the bus compartment is established. The grid independence and the selection of turbulent equations are studied. The Realizable k- 蔚 model is chosen. The velocity field and temperature field in the car are measured. The simulation results are in good agreement with the experimental data. The reliability of numerical simulation is verified. The three models of no load, full seat and full seat are calculated by FLUNT software, and ten different conditions of air supply parameters under full seat model are calculated. Tecplot software is used to extract a large number of distribution maps of velocity field and temperature field of typical cross section, as well as the temperature and velocity data of some characteristic points along the Z axis of carriage height. Finally, the results are compared. This paper qualitatively analyzes the influence of passenger number and air supply parameters on airflow organization and thermal comfort in the carriage. The calculation results of FLUENT software are obtained, and the statistical analysis is carried out. Several typical sections of the carriage are selected. The non-uniformity coefficient method and the air diffusivity index (ADPI) were used to evaluate the airflow distribution. The thermal comfort of human body was evaluated by equivalent temperature EQT, and the economic evaluation of bus air-conditioning system was carried out with energy utilization coefficient (input energy utilization coefficient). According to the previous analysis results, under the premise that the air supply parameters (air supply heat) remain unchanged, the optimization design of the bus air conditioning ventilation system is carried out, mainly by changing the vehicle glass material. The air conditioning system with independent control in multi-temperature zone is designed, which improves the thermal comfort of the compartments greatly.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U469.72

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 馬曉婧;;客車空調(diào)熱負(fù)荷研究[J];甘肅科技;2014年23期

2 王燁;徐燃;;青藏線空調(diào)列車室內(nèi)氣流組織的沿線變化數(shù)值分析[J];重慶大學(xué)學(xué)報(bào);2014年09期

3 谷正氣;申紅麗;楊振東;尹郁琦;;汽車空調(diào)風(fēng)道改進(jìn)及對(duì)乘員熱舒適性影響分析[J];重慶大學(xué)學(xué)報(bào);2013年08期

4 李代林;張華;;汽車空調(diào)冷負(fù)荷的計(jì)算方法[J];客車技術(shù)與研究;2009年02期

5 張杰山;陳見;許濤;;轎車空調(diào)三維流動(dòng)與傳熱研究[J];天津汽車;2008年02期

6 張登春;翁培奮;;載人列車車廂內(nèi)空氣流場(chǎng)溫度場(chǎng)數(shù)值模擬[J];計(jì)算力學(xué)學(xué)報(bào);2007年06期

7 吳俊云;陳國(guó)娟;吳兆林;王剛;;風(fēng)口布置對(duì)空調(diào)車室內(nèi)流動(dòng)與傳熱影響的數(shù)值研究[J];上海理工大學(xué)學(xué)報(bào);2007年04期

8 吳慶;戴細(xì)安;;微型汽車空調(diào)制冷量的簡(jiǎn)化計(jì)算[J];裝備制造技術(shù);2006年04期

9 徐德蜀;;安全文化、安全科技與科學(xué)安全生產(chǎn)觀[J];中國(guó)安全科學(xué)學(xué)報(bào);2006年03期

10 張國(guó)俊;鐘英杰;張雪梅;徐璋;任建莉;;考慮太陽(yáng)光照射和人體散熱的車內(nèi)氣流場(chǎng)與溫度場(chǎng)的數(shù)值模擬[J];汽車工程;2006年01期

，

本文編號(hào)：1392748