【摘要】：高溫流體通過(guò)噴嘴是節(jié)流流動(dòng)的過(guò)程,會(huì)引起流體內(nèi)部溫度的變化,將影響高溫射流沖擊力與熱裂解效應(yīng)等。應(yīng)用超臨界水物性方程與焦湯系數(shù)的定義公式,推導(dǎo)出了射流通過(guò)噴嘴過(guò)程的焦耳湯姆遜系數(shù)的求解公式,并編制程序迭代求解,得到不同參數(shù)條件下焦耳湯姆遜系數(shù)分布特性與變化規(guī)律,并采用焦湯系數(shù)計(jì)算公式,計(jì)算得到不同參數(shù)下過(guò)噴嘴節(jié)流過(guò)程中降低溫度值的變化規(guī)律。結(jié)果表明,在25~65 MPa和650~1 000 K的條件下,焦耳湯姆遜系數(shù)為正,隨著反應(yīng)腔內(nèi)溫度的增加,焦耳湯姆遜系數(shù)先增大后減小,在文中條件下的最大值為4.92;而隨著反應(yīng)腔內(nèi)壓力的增加,焦耳湯姆遜系數(shù)降低,在65MPa,650 K條件下取得最小值0.22。焦湯效應(yīng)的最大值均出現(xiàn)在過(guò)熱蒸汽區(qū),且隨著溫度的增加,最大值偏離分界線。在射流噴射過(guò)程中,溫度壓力降低值不可忽略,文中條件下最大可達(dá)73.5 K,應(yīng)當(dāng)合理設(shè)置反應(yīng)腔內(nèi)溫度壓力值,降低高溫射流通過(guò)噴嘴過(guò)程的溫度損失。
[Abstract]:The high temperature fluid passing through the nozzle is a throttle flow process, which will cause the change of the internal temperature of the fluid, which will affect the impact force of the high temperature jet and the effect of pyrolysis, etc. Based on the supercritical water property equation and the definition formula of the coke soup coefficient, the solution formula of the joule Thomson coefficient in the process of jet passing through the nozzle is derived, and the program is programmed to solve the problem iteratively. The distribution and variation of the Thomson coefficient of Joule under different parameters are obtained. The variation of temperature during throttling of the nozzle under different parameters is calculated by using the formula of coke soup coefficient. The results show that the Thomson coefficient of Joule is positive under the conditions of 25 MPa and 650 K. With the increase of temperature in the reaction chamber, the Thomson coefficient of Joule increases first and then decreases. The maximum value is 4.92, and the minimum value is 0.22 at 65MPA ~ 650K with the increase of pressure in the reaction chamber, the Joule Thomson coefficient decreases. The maximum value of Jiaotang effect appears in the superheated steam region and deviates from the dividing line with the increase of temperature. In the jet injection process, the temperature and pressure decrease can not be ignored, and the maximum temperature pressure in the reaction chamber should be set reasonably to reduce the temperature loss in the process of high temperature jet passing through the nozzle.
【作者單位】： 油氣資源與探測(cè)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)石油大學(xué)(北京)石油工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目“深層高溫高壓油氣井安全高效鉆完井基礎(chǔ)研究”(編號(hào):U1562212);“高溫射流沖擊-熱裂解耦合破巖機(jī)理與實(shí)驗(yàn)研究”(編號(hào):51504272) 中國(guó)石油科技創(chuàng)新基金研究項(xiàng)目“熱力射流沖擊-裂解耦合破巖機(jī)理研究”(編號(hào):2015D-5006-0308)
【分類(lèi)號(hào)】：TE21
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本文編號(hào)：2195381