本文選題：固定節(jié)流孔 + 流量特性　； 參考：《武漢理工大學》2014年碩士論文

【摘要】：氣動元件的流量特性是一個十分重要的技術指標，準確的了解氣動元件的流量特性對氣動控制系統(tǒng)的設計具有重要意義。氣動元件由一個或多個基本組件組成，通過對這些基本組件的流量特性進行研究和分析，深入了解其工作的機理，從而全面和準確的把握氣動元件的流量特性參數的變化規(guī)律，這對氣動技術的發(fā)展和研究都有重要的現(xiàn)實意義。 節(jié)流孔是氣動元件中常見的基本組件，目前的研究較少，因此本文以某國際合作項目為支撐，以固定節(jié)流孔為研究對象，以流量特性理論為基礎，結合國際標準ISO6358的測試方法，理論研究與實驗相結合，，軟件仿真加以對比的方法，設計針對固定節(jié)流孔流量特性的實驗方法，分析固定節(jié)流孔的結構參數與其流量特性參數之間的關系。本文的主要研究工作如下： （1）分析國內外氣動元件和節(jié)流孔的流量特性研究現(xiàn)狀，確定本文的研究方向和研究思路，為仿真分析和實驗方法的研究提供了參考。 （2）對固定節(jié)流孔流量特性進行理論分析和研究。首先分析固定節(jié)流孔流量特性的基礎理論，介紹幾種常見的流量特性測試標準和表示方法；然后根據固定節(jié)流孔的結構特點，選擇合適的流量特性表示方法和測試標準，為測試系統(tǒng)的設計提供依據；最后，分析流量特性參數的計算公式，推導出固定節(jié)流孔結構參數與流量特性參數之間的關系式。 （3）對固定節(jié)流孔的流量特性進行仿真分析。利用ICEM CFD對已建立的模型進行網格化分，將劃分好的模型導入Fluent中進行仿真，通過理論分析和仿真結果的對比，驗證建模和仿真的正確性，然后對固定節(jié)流孔的結構參數與流量特性參數的關系進行更全面深入的分析。 （4）研究固定節(jié)流孔的實驗。根據選定的測試標準進行測試系統(tǒng)的設計，并根據實驗結果對實驗的操作流程進行完善，最后將實驗結果、仿真和理論分析進行對比，驗證實驗方法的可行性，分析數據誤差的產生原因，并對固定節(jié)流孔結構參數與流量特性參數的關系進行數據擬合，得到了兩者的關系式。 本文的研究工作展示了固定節(jié)流孔流量特性的仿真分析及實驗方法，論文的研究方法對固定節(jié)流孔流量特性的研究具有理論指導意義和工程應用價值。
[Abstract]:The flow characteristic of the pneumatic element is a very important technical index. It is of great significance to understand the flow characteristics of the pneumatic components accurately. The pneumatic components are composed of one or more basic components. Through the study and analysis of the flow characteristics of these basic components, the mechanism of their work is deeply understood. In order to comprehensively and accurately grasp the change rule of the flow characteristic parameters of pneumatic components, it has important practical significance for the development and research of pneumatic technology.
The throttle hole is a common basic component in the pneumatic components, and the current research is less. Therefore, this paper, based on a certain international cooperation project, takes the fixed throttle as the research object, based on the theory of flow characteristics, combined with the test method of international standard ISO6358, the combination of theoretical research and testing, and the contrast method of software simulation, and the design needle. The relationship between the structure parameters of the fixed throttle hole and the parameters of the flow characteristic is analyzed by the experimental method of the flow characteristics of the fixed throttle. The main research work in this paper is as follows:
(1) to analyze the current research status of the flow characteristics of pneumatic components and throttle holes at home and abroad, to determine the research direction and research ideas in this paper, and to provide a reference for the research of simulation analysis and experimental methods.
(2) theoretical analysis and Research on the flow characteristics of fixed throttle holes. First, the basic theory of the flow characteristics of fixed throttle holes is analyzed, and several common testing standards and presentation methods of flow characteristics are introduced. Then, according to the structure characteristics of the fixed throttle hole, the suitable flow specificity and testing standards are selected to set up the test system. Finally, the formula for calculating the flow characteristic parameters is derived, and the relationship between the structural parameters of the fixed throttle orifice and the flow characteristic parameters is derived.
(3) the flow characteristics of the fixed throttle hole are simulated and analyzed. ICEM CFD is used to mesh the established model, and the good model is introduced into the Fluent for simulation. The correctness of the modeling and simulation is verified through the comparison of the theoretical analysis and the simulation results. Then the structure parameters and the flow characteristic parameters of the fixed throttle hole are then fixed. A more comprehensive and in-depth analysis of the relationship.
(4) the experiment of fixed throttle hole is studied. According to the selected test standard, the test system is designed, and the operation process of the experiment is perfected according to the experimental results. Finally, the experimental results, simulation and theoretical analysis are compared to verify the feasibility of the experimental method, analyze the cause of the data error and the structure of the fixed throttle hole structure. The relationship between number and flow characteristic parameters is fitted by data, and the relationship between them is obtained.
The research work of this paper shows the simulation analysis and experimental method of the flow characteristic of fixed throttle hole. The research method of this paper has theoretical guiding significance and engineering application value for the study of the flow characteristic of fixed throttle.

【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TH138.5

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