苏万华
柴油机及电液调速器
个性化签名
- 姓名:苏万华
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师,
- 职称:-
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学科领域:
动力机械工程
- 研究兴趣:柴油机及电液调速器
苏万华,教授,博士生导师,天津大学内燃机燃烧学国家重点实验室主任,2002年由国家科技部聘任为国家重点基础研究规划(‘973’)项目“新一代内燃机燃烧理论和石油燃料替代途径的基础研究”首席科学家。国务院学位委员会学科评议组成员。中国内燃机学会常务理事,中国内燃机学会燃烧、节能、净化分会主任,内燃机学报主编。2000年入选中国科协国内外著名学者人才库。1993年获教育部科技进步奖(甲)二等奖,1996年获首届GM-中国杰出科技成就一等奖(Kettering 杰出成就奖),1999年获国家教育部科技进步奖(基础理论)二等奖。2002年获天津市技术发明二等奖。
1965年毕业于天津大学内燃机专业,1965―1968年在天津大学进行研究生学习,1968―1977年在天津动力机厂,从事柴油机及电液调速器开发研究。1978年之后,在天津大学热能所,内燃机燃烧学国家重点实验室,从事内燃机燃烧学及燃烧控制的研究。1984―1985年在挪威理工大学进修,1994年在美国威斯康星大学内燃机研究中心,客座教授。
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414
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成果数
13
苏万华, 张晓宇, 裴毅强, 赵昌普, 林铁坚, 赵华
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-1年11月30日
用CFD数值模拟方法研究了一种新型燃烧室设计——BUMP燃烧室对直喷柴油机喷雾燃烧过程的影响。模拟表明,bump环扰动缸内气流运动产生复杂的流谱,形成强烈的湍流,强化燃油与空气的湍流混合速度。此外,燃油喷雾撞壁后,bump环剥离壁面射流形成二次空间射流,减少了燃油在燃烧室壁面的沉积,湍流混合速率大大增加,燃烧过程得到明显改善。数值模拟解释了BUMP燃烧室在不增加燃油消耗的情况下获得低排放的实验现象。
均质充量压燃, 燃烧室, 混合气形成, CFD, 数值模拟
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【期刊论文】气口顺序喷射、稀燃、全电控柴油/天然气双燃料发动机的研究1
苏万华, 林志强, 汪洋, 谢辉, 王江, 裴毅强, 费向阳, 刘文胜, 李红珍, 王根生
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-1年11月30日
采用气口顺序喷射、稀燃、全电控柴油/天然气双燃料发动机方案,对斯太尔WD615.64增压非中冷柴油机进行了改装。实验结果表明,改装后的发动机NOx、颗粒和NMHC排放均达到了欧II排放指标。CO和HC(含甲烷)可以通过后处理解决。
双燃料发动机, 稀燃, 电子控制
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【期刊论文】基于Lagrange-SUMT方法的全电控柴油引燃天然气发动机MAP优化标定技术1
苏万华, 林志强
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-1年11月30日
利用非线性规划理论,采用Lagrange-SUMT方法建立了电控发动机全工况范围内多变量、多目标的优化模型,并在全电控柴油引燃天然气发动机上进行了应用。实验结果证明,该方法可以减少优化参数的实验量,可以在较少的实验量基础上获得最优控制MAP。发动机的NOx,碳烟排放明显优于欧洲II排放标准,经济性与原柴油机相当。
标定技术, Lagrange-SUMT方法, 最优控制MAP, 电控发动机
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【期刊论文】MULINBUMP-HCCI复合燃烧放热特征及其对排放和热效率的影响1
苏万华, 林铁坚, 张晓宇, 裴毅强, 赵华
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-1年11月30日
作者提出了基于多脉冲喷射和BUMP燃烧室的MULINBUMP-HCCI复合燃烧技术。发动机实验和CFD数值模拟研究表明,多脉冲喷射参数,特别是多脉冲喷射定时可以控制预混合气的形成,从而控制燃烧放热率。具有分布式放热率的工作过程的热效率与直喷式柴油机相当。但同时改善了NOx和碳烟排放,在不采用废气再循环的条件下,NOx排放在较低负荷时只有11×10-6,高负荷时也不超过250×10-6。碳烟排放始终小于0.5BSU。
均质压燃, 复合燃烧, 柴油机, 放热模式, 热效率
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35浏览
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229下载
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苏万华, Zhiqiang Lin and Wanhua
,-0001,():
-1年11月30日
A sequential port injection, lean-burn, fully electronically-controlled compressed natural gas (CNG)/Diesel dual-fuel engine has been developed based on a turbo-charged and inter-cooled direct injection (D.I.) diesel engine. During the optimization of engine overall performance, the effects of pilot diesel and pre-mixed CNG/air mixture equivalence ratio on emissions (CO, HC, NOx, soot), knocking, misfire and fuel economy are studied. The rich and lean boundaries of the pre-mixed CNG/air mixture versus engine load are also provided, considering the acceptable values of NOx and THC emissions, respectively. It is interesting to find that there is a critical amount of pilot diesel for each load and speed point, which proved to be the optimum amount of pilot fuel. Any decrease in the amount of pilot diesel from this optimum amount results in an increase of NOx emissions, because the pre-mixed CNG/air mixture must be made richer, otherwise THC emissions would increase. However, the soot emissions remain almost unchanged at a very low level.
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72浏览
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146下载
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苏万华, Wanhua Su, Yang Wang, Hui Xie, Tiejian Lin, Yiqiang Pei, Shao'an Li
,-0001,():
-1年11月30日
FIRCRI-a flexible injection rate common rail injector was developed. This paper presents the working principle and the configuration of the injector. As key technologies in development of the injector, a new fast response solenoid valve was developed and 4 dimensionless design parameters of hydraulic system were presented by through computer simulation and experimental study. The solenoid valve was deliberately designed so as to eliminate the hydraulic force acting on the valve. Other configuration parameters were also optimized so that the response time of the solenoid valve is 0.3ms. It is interesting to find that the response time of the injector is not only determined by the solenoid valve, but all parameters of the hydraulic system of the injector. The injector can realize pilot injection, which is less than 2.5mm3, at a controllable phase and multi-injections. The injection rate of the injector can be regulated as echelon and boot shape, according to the requirement fitting engine combustion system by change some parts of the injector.
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苏万华, Zhiqiang Lin and Wanhua Su
,-0001,():
-1年11月30日
A sequential port injection, lean-burn, fully electronically-controlled compressed natural gas (CNG)/Diesel dual-fuel engine has been developed based on a turbo-charged and inter-cooled direct injection (D.I.) diesel engine. During the optimization of engine overall performance, the effects of pilot diesel and pre-mixed CNG/air mixture equivalence ratio on emissions (CO, HC, NOx, soot), knocking, misfire and fuel economy are studied. The rich and lean boundaries of the pre-mixed CNG/air mixture versus engine load are also provided, considering the acceptable values of NOx and THC emissions, respectively. It is interesting to find that there is a critical amount of pilot diesel for each load and speed point, which proved to be the optimum amount of pilot fuel. Any decrease in the amount of pilot diesel from this optimum amount results in an increase of NOx emissions, because the pre-mixed CNG/air mixture must be made richer, otherwise THC emissions would increase. However, the soot emissions remain almost unchanged at a very low level.
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27浏览
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173下载
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苏万华, Wanhua Su, Yang Wang, Hui Xie, Tiejian Lin, Yiqiang Pei, Shao' an Li
,-0001,():
-1年11月30日
FIRCRI-a flexible injection rate common rail injector was developed. This paper presents the working principle and the configuration of the injector. As key technologies in development of the injector, a new fast response solenoid valve was developed and 4 dimensionless design parameters of hydraulic system were presented by through computer simulation and experimental study. The solenoid valve was deliberately designed so as to eliminate the hydraulic force acting on the valve. Other configuration parameters were also optimized so that the response time of the solenoid valve is 0.3ms. It is interesting to find that the response time of the injector is not only determined by the solenoid valve, but all parameters of the hydraulic system of the injector. The injector can realize pilot injection, which is less than 2.5mm3, at a controllable phase and multi-injections. The injection rate of the injector can be regulated as echelon and boot shape, according to the requirement fitting engine combustion system by change some parts of the injector.
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39浏览
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141下载
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【期刊论文】Enhancement of Near Wall Mixing of an Impinging Jet By Means of a Bump on the Wall
苏万华, Wanhua Su, Rongwen Lin, Hui Xie and Shao-xi Shi
,-0001,():
-1年11月30日
It is found that a thin and rich mixture layer on a wall is formed after impingement of a gas jet of fuel on the wall. The measured thickness of the mixture layer is about 2mm. and its dispersion rate after the end of injection is much lower, compared to that of a space gas jet. This phenomenon in a small D.I. diesel engine is known as "wall setting" or "wall fuel accumulation" which has an important influence on engine fuel consumption and emissions. This paper presents a technique for enhancing the near wall mixing of an impinging jet by means of a bump on the wall. The development of a wall jet formed after an impingement of a gas jet has been investigated by simultaneously measuring the near wall velocity and concentration distribution. It has been found that a wall jet is stripped off the wall and ejected as a secondary-jet when the wall jet encounters a bump of the wall. Effects of the bump height, the location of the 'bump and the impingement angle are studied at a number of-typical conditions. The distributions of velocity and concentration of a secondary jet are also investigated in detail and the non-dimensional distributions for velocity and concentration of a secondary jet are derived based on the data statistics. In addition, the concept of concentration mean dispersion rate is employed in data processing in order to understand the effects of the bump geometry on mixing rate. It has experimentally confirmed that a controllable mixing process of "space-wall-space" for an impinging jet may be realized by means of a bump setting on the wall.
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苏万华, Wanhua Su, Tiejian Lin and Yiqiang Pei
,-0001,():
-1年11月30日
This paper presents a compound combustion technology of Premixed Combustion and "Lean Diffusion Combustion" for realizing the concept of HCCI combustion in a D I diesel engine. The premixed combustion is achieved by the technology of multi-pulse fuel injection. The start of pulse injection, injection-pulse number, injection period of each pulse and the dwell time between the injection pulses are controlled. The objective of controlling the pulse injection is to limit the spray penetration of the pulse injection so that the fuel will not impinge on the cylinder liner, and to enhance the mixing rate of each fuel parcel by promoting the disturbance to the fuel parcels. The last or main injection pulse is set around TDC. A flash mixing technology is developed from the development of a so-called BUMP combustion chamber, which is designed with some special bump rings. The combustion of fuel injected in the main injection proceeds under the effect of the BUMP combustion chamber at much higher air/fuel mixing rate than does in a conventional DI diesel engine, which leads to "lean diffusion combustion". The effects of multi-pulse injection and BUMP combustion chamber on auto-ignition, rate of heat release and engine emissions are discussed.
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