本文選題：液氦溫區(qū) + VM制冷機��； 參考：《工程熱物理學報》2017年04期

【摘要】：本文對液氦溫區(qū)Vuilleumier耦合脈沖管(VM-PT)制冷機進行了數(shù)值計算研究。為了減小來自室溫的漏熱,將氣庫置于一級冷頭之上。采用SAGE軟件建立了數(shù)值計算模型,以無負荷制冷溫度為目標函數(shù)對制冷機運行參數(shù)進行了優(yōu)化。為了進一步了解制冷機的工作原理,研究了脈沖管制冷機內(nèi)焓流、聲功、熵流、壓力波、體積流率及溫度的沿程分布,并對其相位關系和可用能損失進行了分析。計算結果表明,該制冷機可在平均壓力0.9 MPa、壓比1.61、運行頻率0.8Hz時得到3.69 K的無負荷制冷溫度,在4.2 K時可提供16.24 mW制冷量。
[Abstract]:In this paper, the numerical calculation of Vuilleumier coupled pulse tube (VM-PTT) refrigerator in liquid helium temperature region has been carried out. In order to reduce heat leakage from room temperature, the gas reservoir is placed on the first stage cold head. The numerical calculation model was established by using SAGE software, and the operating parameters of the refrigerator were optimized by taking the temperature of no-load refrigeration as the objective function. In order to further understand the working principle of the refrigerator, the distribution of enthalpy flow, acoustic work, entropy flow, pressure wave, volume flow rate and temperature in the pulse tube refrigerator is studied, and the phase relationship and available energy loss are analyzed. The calculated results show that the refrigerator can obtain a load free refrigeration temperature of 3.69 K at an average pressure of 0.9 MPA, a pressure ratio of 1.61 and a frequency of 0.8Hz, and a cooling capacity of 16.24 MW at 4.2 K.
【作者單位】： 中國科學院低溫工程學重點實驗室(理化技術研究所);中國科學院大學;
【基金】：國家自然科學基金資助項目(No.51276188;No.51427806) 博士后創(chuàng)新人才支持計劃資助項目(No.BX201600173)
【分類號】：TB651
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本文編號：1873771