渦流二極管的設(shè)計優(yōu)化與實驗研究
發(fā)布時間:2018-10-24 15:17
【摘要】:渦流二極管是一種控制流體單向流動的元件,,其作用類似于逆止閥。由于其具有結(jié)構(gòu)簡單、無轉(zhuǎn)動部件、不需外部控制和動力、可靠性高等諸多優(yōu)點,在醫(yī)學(xué)、核工業(yè)、石油化工等行業(yè)都有著廣泛的應(yīng)用。也可以應(yīng)用于氟鹽冷卻高溫堆的非能動余熱排出。 本文首先使用計算流體動力學(xué)模擬了渦流二極管的內(nèi)部流動特性,之后根據(jù)對模擬結(jié)果的分析,提出了幾何結(jié)構(gòu)優(yōu)化方案,即在渦腔底部中央處增加錐角,并改變切向管和渦腔連接處的過渡圓弧半徑,并通過數(shù)值模擬結(jié)合實驗的方法,得出最佳的優(yōu)化尺寸。此外,本文根據(jù)相似理論,對水實驗結(jié)果在熔鹽上的適用性進行了分析,并通過數(shù)值計算對;椒ㄟM行了驗證,為進一步優(yōu)化渦流二極管的設(shè)計提供指導(dǎo)。
[Abstract]:Eddy-current diode is a kind of element which controls the flow of fluid in one-way, and its function is similar to that of reverse stop valve. Because of its simple structure, no rotating parts, no external control and power, high reliability and many other advantages, it has been widely used in medicine, nuclear industry, petrochemical industry and so on. It can also be used for inactive residual heat removal from fluorine salt cooled high temperature reactor. In this paper, the internal flow characteristics of vortex diodes are simulated by computational fluid dynamics (CFD). Then, based on the analysis of the simulation results, a geometric structure optimization scheme is proposed, which is to increase the cone angle at the center of the bottom of the vortex cavity. The radius of the transition arc at the junction of the tangential tube and the vortex cavity is changed and the optimum size is obtained by numerical simulation and experiments. In addition, according to the similarity theory, the applicability of the water experiment results on molten salt is analyzed, and the simulation method is verified by numerical calculation, which provides guidance for the further optimization of the design of eddy current diodes.
【學(xué)位授予單位】:中國科學(xué)院研究生院(上海應(yīng)用物理研究所)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TL35;TH134
本文編號:2291736
[Abstract]:Eddy-current diode is a kind of element which controls the flow of fluid in one-way, and its function is similar to that of reverse stop valve. Because of its simple structure, no rotating parts, no external control and power, high reliability and many other advantages, it has been widely used in medicine, nuclear industry, petrochemical industry and so on. It can also be used for inactive residual heat removal from fluorine salt cooled high temperature reactor. In this paper, the internal flow characteristics of vortex diodes are simulated by computational fluid dynamics (CFD). Then, based on the analysis of the simulation results, a geometric structure optimization scheme is proposed, which is to increase the cone angle at the center of the bottom of the vortex cavity. The radius of the transition arc at the junction of the tangential tube and the vortex cavity is changed and the optimum size is obtained by numerical simulation and experiments. In addition, according to the similarity theory, the applicability of the water experiment results on molten salt is analyzed, and the simulation method is verified by numerical calculation, which provides guidance for the further optimization of the design of eddy current diodes.
【學(xué)位授予單位】:中國科學(xué)院研究生院(上海應(yīng)用物理研究所)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TL35;TH134
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本文編號:2291736
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