本文選題：旋流器　切入點(diǎn)：計算流體力學(xué)　出處：《武漢科技大學(xué)》2016年碩士論文

【摘要】：旋流器由于結(jié)構(gòu)簡單、安裝方便、操作便捷等優(yōu)點(diǎn),被廣泛應(yīng)用于各個工業(yè)領(lǐng)域。從旋流器使用以來,磨損問題一直是制約旋流器應(yīng)用和發(fā)展的重要問題,受到人們的極大關(guān)注。雖然在耐磨材料方面進(jìn)行了大量研究,但事實(shí)表明,旋流器磨損問題仍然存在。本文針對固液分離旋流器存在的磨損問題,通過計算流體力學(xué)技術(shù),對旋流器壁面的磨損進(jìn)行數(shù)值模擬研究,同時提出一種環(huán)縫內(nèi)襯固液分離耐磨旋流器,并將環(huán)縫內(nèi)襯耐磨旋流器與普通旋流器磨損進(jìn)行了對比分析。首先,對旋流器磨損機(jī)理以及固液兩相流計算方法、磨損模型進(jìn)行了探討,利用CFD,應(yīng)用ANSYS軟件中的CFX,對普通φ250mm固液分離旋流器磨損進(jìn)行模擬研究。結(jié)果表明:旋流器壁面磨損主要集中在入口處、圓錐體與圓柱筒體交界處及底流口處。磨損部位呈螺旋帶狀不均勻分布在旋流器筒體和圓錐體壁面上,旋流器壁面入口處及底流口的磨損率較其它部位大,出現(xiàn)磨損率峰值。然后,根據(jù)模擬結(jié)果,針對旋流器壁面磨損問題,提出一種環(huán)縫內(nèi)襯固液分離耐磨旋流器,即在旋流器內(nèi)部增設(shè)環(huán)縫內(nèi)襯,并對其進(jìn)行了磨損模擬,將模擬結(jié)果和普通旋流器模擬結(jié)果進(jìn)行對比。結(jié)果表明:由于環(huán)縫內(nèi)襯的存在,大幅度降低了旋流器壁面的磨損。另外,針對環(huán)縫內(nèi)襯的結(jié)構(gòu)形式,提出另一種螺旋縫內(nèi)襯結(jié)構(gòu),并對螺旋縫內(nèi)襯旋流器磨損進(jìn)行了數(shù)值模擬。將兩種不同內(nèi)襯結(jié)構(gòu)的模擬結(jié)果及普通旋流器模擬結(jié)果進(jìn)行兩兩相互對比,結(jié)果表明,兩種帶內(nèi)襯的旋流器磨損都比普通旋流器磨損大幅度降低;在兩種不同內(nèi)襯結(jié)構(gòu)形式中,環(huán)縫內(nèi)襯旋流器的磨損較螺旋縫內(nèi)襯結(jié)構(gòu)的磨損仍有所降低,即環(huán)縫內(nèi)襯結(jié)構(gòu)為最優(yōu)內(nèi)襯結(jié)構(gòu)形式,為耐磨旋流器的工業(yè)設(shè)計提供了指導(dǎo)。
[Abstract]:Hydrocyclone is widely used in various industrial fields because of its simple structure, convenient installation and convenient operation.Since the use of hydrocyclone, wear problem has been an important problem restricting the application and development of hydrocyclone.Although a great deal of research has been done on wear resistant materials, the fact shows that the wear problem of hydrocyclone still exists.In this paper, the wear problem of solid / liquid separation hydrocyclone is studied by means of computational fluid dynamics (CFD), and a kind of annular lining solid / liquid separation wear-resistant cyclone is proposed.The wear of annular lining wear-resistant cyclone is compared with that of ordinary cyclone.Firstly, the wear mechanism of hydrocyclone, the calculation method of solid-liquid two-phase flow and the wear model are discussed. The wear of ordinary 蠁 250mm solid-liquid separation cyclone is simulated by using CFDs and CFXs in ANSYS software.The results show that the wall wear of the cyclone is mainly concentrated at the entrance, the conical and cylindrical cylinder interface and the bottom outlet.The wear zone is distributed unevenly on the wall of the cylinder and cone of the hydrocyclone. The wear rate of the wall entrance and bottom outlet of the cyclone is higher than that of the other parts, and the wear rate peak value appears.Then, according to the simulation results, aiming at the problem of wall wear of hydrocyclone, a kind of wear-resistant cyclone with annular lining is put forward, that is, the annular lining is added inside the cyclone, and the wear simulation is carried out.The simulation results are compared with those of conventional hydrocyclone.The results show that the wall wear of hydrocyclone is greatly reduced due to the existence of annular lining.In addition, according to the structure form of annular lining, another spiral seam lining structure is proposed, and the wear of spiral seam lining cyclone is numerically simulated.The simulation results of two kinds of different lining structures and the simulation results of ordinary hydrocyclone are compared. The results show that the wear of the two kinds of hydrocyclone with inner lining is much lower than that of ordinary cyclone, and in the two different lining structures,The wear of annular lining cyclone is still lower than that of spiral seam lining structure, that is, the annular lining structure is the optimal inner lining structure form, which provides guidance for the industrial design of wear-resistant cyclone.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TQ051.8

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