板—泡式换热器传热及阻力性能研究
发布时间：2018-08-13 10:41
【摘要】：板-泡式换热器是一种新型高效紧凑式换热器,相比于传统换热器,其具有传热效率高、体积小、承压能力强等诸多优点,能显著提高热能利用效率、降低能耗、延长使用寿命。因此,板-泡式换热器具有广阔的工程应用前景。以多孔泡沫金属作为流体通道的板-泡式换热器,通过泡沫金属拓展传热面积,由于结构的高度紧凑,使得换热面壁温的测量难以实现,传统的测试方法已不能满足测试要求；而现有的数值模拟方法,由于缺少合适的流体力学计算模型,也不能准确获知其内部真实流动和传热情况。针对上述问题,本文应用试验测试及数值模拟的方法研究板-泡式换热器的传热与阻力性能,主要研究工作如下：1)基于单吹瞬变法,搭建不需测量壁温便可求得换热面传热系数的试验测试平台,并编写数据采集及系统控制程序,通过分析系统响应特性及测试结果误差,验证测试系统的稳定性及测量准确性。2)设计不同结构参数的板-泡式换热器测试试样,对其进行试验测试,获得各试样传热与阻力性能曲线,拟合传热及阻力准则关系式。3)基于FLUENT多孔介质模型,从整体上建立板-泡式换热器整体几何模型,并模拟分析换热器内流体流动及温度分布情况,通过试验验证数值模拟的可行性和准确性,基于该模型进一步分析结构参数对板-泡式换热器传热及阻力性能的影响情况。
[Abstract]:The plate-bubble heat exchanger is a new type of high efficiency and compact heat exchanger. Compared with the traditional heat exchanger, it has many advantages such as high heat transfer efficiency, small volume and strong pressure bearing capacity, which can significantly improve the efficiency of heat energy utilization and reduce energy consumption. Extend service life. Therefore, the plate-bubble heat exchanger has a broad engineering application prospects. The plate-bubble heat exchanger with porous foam metal as the fluid channel expands the heat transfer area through the foam metal. Because the structure is highly compact, it is difficult to realize the measurement of the heat transfer surface wall temperature. The traditional testing method can not meet the test requirements. However, the existing numerical simulation methods can not accurately know the real flow and heat transfer due to the lack of a suitable hydrodynamic calculation model. In order to solve the above problems, the heat transfer and drag performance of plate-bubble heat exchanger is studied by means of experimental test and numerical simulation. The main research work is as follows: 1) based on single blow transient method, A test platform for heat transfer coefficient of heat transfer surface can be obtained without measuring wall temperature. Data acquisition and system control program are compiled. The system response characteristics and the error of test results are analyzed. To verify the stability and accuracy of the test system (.2) to design test samples with different structural parameters for plate-bubble heat exchangers, and to test them and obtain the heat transfer and resistance performance curves of each specimen. Based on the FLUENT porous media model, the integral geometric model of plate-bubble heat exchanger is established, and the fluid flow and temperature distribution in the heat exchanger are simulated and analyzed. The feasibility and accuracy of numerical simulation are verified by experiments. Based on the model, the influence of structural parameters on heat transfer and resistance performance of plate-bubble heat exchanger is further analyzed.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TK172
[Abstract]:The plate-bubble heat exchanger is a new type of high efficiency and compact heat exchanger. Compared with the traditional heat exchanger, it has many advantages such as high heat transfer efficiency, small volume and strong pressure bearing capacity, which can significantly improve the efficiency of heat energy utilization and reduce energy consumption. Extend service life. Therefore, the plate-bubble heat exchanger has a broad engineering application prospects. The plate-bubble heat exchanger with porous foam metal as the fluid channel expands the heat transfer area through the foam metal. Because the structure is highly compact, it is difficult to realize the measurement of the heat transfer surface wall temperature. The traditional testing method can not meet the test requirements. However, the existing numerical simulation methods can not accurately know the real flow and heat transfer due to the lack of a suitable hydrodynamic calculation model. In order to solve the above problems, the heat transfer and drag performance of plate-bubble heat exchanger is studied by means of experimental test and numerical simulation. The main research work is as follows: 1) based on single blow transient method, A test platform for heat transfer coefficient of heat transfer surface can be obtained without measuring wall temperature. Data acquisition and system control program are compiled. The system response characteristics and the error of test results are analyzed. To verify the stability and accuracy of the test system (.2) to design test samples with different structural parameters for plate-bubble heat exchangers, and to test them and obtain the heat transfer and resistance performance curves of each specimen. Based on the FLUENT porous media model, the integral geometric model of plate-bubble heat exchanger is established, and the fluid flow and temperature distribution in the heat exchanger are simulated and analyzed. The feasibility and accuracy of numerical simulation are verified by experiments. Based on the model, the influence of structural parameters on heat transfer and resistance performance of plate-bubble heat exchanger is further analyzed.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TK172
【参考文献】
相关期刊论文 前10条
1 王晓鲁;姜培学;单或W，
本文编号：2180729
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