取暖器热场分析技术的研究与应用

发布时间：2018-03-14 04:02

本文选题：取暖器　切入点：热场　出处：《广东工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：取暖器的设计涉及结构、空气动力学、传热学的理论,因企业设计技术水平和成本的限制,很少有企业会详细的计算各种参数对取暖器性能的影响,大多是依靠经验进行设计。在完成设计工作后,需要生产物理样机来测试产品的性能,然后根据试验数据去指导设计更改。由于对取暖器内部热场分布及其原因不清楚,这种对产品进行的改进具有一定的主观性和盲目性。因此,实验的过程需要反复几遍,才能得到合格的产品,增加了产品研发周期和成本。利用计算流体动力学理论,结合传热学基本原理,可以准确地模拟产品的热场分布情况,但由于这种分析对理论要求较高,一般工程师很难完成,这就出现了先进技术无法在实际生产中发挥作用的现象。针对这种情况,本文以取暖器为研究对象,以Solidworks Flow Simulation为分析工具,研究取暖器的热场分析技术,寻找影响取暖器温度分布的因素,并提出产品改进方案。本文主要研究内容如下： (1)建立取暖器热场分析的数学模型。根据产品的特点,分析取暖器内部热量传递的方式,构建每种传热模式的解析计算方法。针对解析算法的难点,研究数值计算方法在取暖器传热过程的应用。 (2)研究对流式取暖器的热场分析方法。分析在热场分析中需要考虑的关键的参数,找出当前产品存在的问题,发掘问题产生的原因。 (3)研究辐射式取暖器的热场分析方法。以市面上常见的反射式取暖器为例,研究反射罩参数的变化对取暖器热场的影响。 (4)研究油汀取暖器热场分析技术。油汀取暖器工作时同时发生空气和导热油两种流体的自然对流运动,研究两种流动的形式及其影响因素,为油汀取暖器产品优化提供参考。 (5)为了降低取暖器热场分析的难度,提高分析效率,研究了Flow Simulation二次开发技术,在三种取暖器热场分析技术的基础上,建立专门应用于取暖器的热场分析平台。 (6)根据对流式取暖器热场分析结果,针对其存在的问题,利用取暖器热场分析平台,对取暖器进行改进分析,验证分析平台的可靠性,同时提高取暖器的安全性能和取暖效率。本文对三种主要类型的取暖器进行研究,为产品热场分析提供一种可靠的方法,有利于取暖器行业研发水平的提高。在总结取暖器热场分析方法的基础上,研究了基于Flow Simulation的取暖器热场分析平台的开发方法,从而使热场分析的流程简化,以降低分析难度,减少出错,提高分析效率,也为企业定制自己产品的研发模式提供一种思路。本文提出的取暖器改进方法,对取暖器的设计开发具有普遍的指导意义,有助于企业研发从经验设计向数字化设计的转变。
[Abstract]:The design of the heater involves the theory of structure, aerodynamics, heat transfer. Because of the limitation of the technical level and cost of the enterprise design, few enterprises will calculate the influence of various parameters on the performance of the heater in detail. Most of the design is based on experience. After the design is completed, a physical prototype is produced to test the performance of the product, and then to guide the design changes according to the test data. Because the distribution of heat field inside the heater and its reasons are not clear, The improvement of the product is subjective and blind. Therefore, the process of the experiment needs to be repeated several times in order to get the qualified product and increase the cycle and cost of product research and development. By using the theory of computational fluid dynamics and the basic principles of heat transfer, the thermal field distribution of the product can be accurately simulated. However, due to the high theoretical requirements for this analysis, it is difficult for the general engineer to complete the analysis. As a result, the advanced technology can not play a role in the actual production. In this paper, the thermofield analysis technology of the heater is studied with Solidworks Flow Simulation as the research object and Solidworks Flow Simulation as the research object. The main contents of this paper are as follows: (1) to find out the factors that affect the temperature distribution of the heater, and to put forward the product improvement scheme. 1) establish the mathematical model of heat field analysis of heater. According to the characteristics of the product, analyze the way of heat transfer inside the heater, and construct the analytical calculation method of each heat transfer mode. The application of numerical calculation method in heat transfer process of heater is studied. 2) the thermal field analysis method of flow heater is studied, the key parameters in thermal field analysis are analyzed, the problems existing in current products are found out, and the causes of the problems are found out. (3) the thermal field analysis method of radiative heater is studied. The influence of the parameters of the reflector on the thermal field of the radiator is studied by taking the reflex heater as an example. The natural convection movement of both air and heat conduction oil is observed simultaneously, and the two kinds of flow forms and their influencing factors are studied, which provides a reference for the optimization of the product of the oil heater. 5) in order to reduce the difficulty of heat field analysis of heater and improve the efficiency of analysis, the secondary development technology of Flow Simulation is studied. Based on three kinds of thermal field analysis technology of heater, a special analysis platform for heat field is established. 6) according to the results of thermal field analysis of flow heater, according to its existing problems, the heater is improved and analyzed by using the platform of heat field analysis of heater, the reliability of the analysis platform is verified, and the safety performance and heating efficiency of the heater are improved at the same time. In this paper, three main types of heaters are studied to provide a reliable method for product thermal field analysis, which is beneficial to the improvement of the research and development level of the heater industry. The development method of heating field analysis platform based on Flow Simulation is studied, which simplifies the process of thermal field analysis, reduces the difficulty of analysis, reduces errors and improves the efficiency of analysis. It also provides a train of thought for enterprises to customize their own product R & D mode. The improved method of heater proposed in this paper has universal guiding significance for the design and development of heater, and is helpful to the transformation of enterprise R & D from empirical design to digital design.
【学位授予单位】：广东工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH122

【引证文献】