制冷
製冷
제랭
REFRIGERATION
2014年
3期
7-10
,共4页
热力学%压力波制冷机%气体分配器%喷管%制冷效率
熱力學%壓力波製冷機%氣體分配器%噴管%製冷效率
열역학%압력파제랭궤%기체분배기%분관%제랭효솔
Thermodynamics%Pressure wave refrigerator%Gas distribution%Nozzle%Refrigerating efficiency
在膨胀比ε=2~6、射流激励频率f=10~240 Hz范围内,研究了气体分配器喷射孔相对深度b/d、振荡管与喷射孔的间距δ和振荡管轴线与喷管中心线错位角度ψ等结构参数对压力波制冷机性能的影响。实验结果表明:压力波制冷机的制冷效率η随b/d的增加先增大后减小,存在一个合适的相对充气时间比范围,在本文的实验范围内,喷射孔相对深度b/d推荐值为0.5,而增大δ与ψ值均会导致η急剧下降,所得结论对压力波制冷机的优化设计有一定指导意义。
在膨脹比ε=2~6、射流激勵頻率f=10~240 Hz範圍內,研究瞭氣體分配器噴射孔相對深度b/d、振盪管與噴射孔的間距δ和振盪管軸線與噴管中心線錯位角度ψ等結構參數對壓力波製冷機性能的影響。實驗結果錶明:壓力波製冷機的製冷效率η隨b/d的增加先增大後減小,存在一箇閤適的相對充氣時間比範圍,在本文的實驗範圍內,噴射孔相對深度b/d推薦值為0.5,而增大δ與ψ值均會導緻η急劇下降,所得結論對壓力波製冷機的優化設計有一定指導意義。
재팽창비ε=2~6、사류격려빈솔f=10~240 Hz범위내,연구료기체분배기분사공상대심도b/d、진탕관여분사공적간거δ화진탕관축선여분관중심선착위각도ψ등결구삼수대압력파제랭궤성능적영향。실험결과표명:압력파제랭궤적제랭효솔η수b/d적증가선증대후감소,존재일개합괄적상대충기시간비범위,재본문적실험범위내,분사공상대심도b/d추천치위0.5,이증대δ여ψ치균회도치η급극하강,소득결론대압력파제랭궤적우화설계유일정지도의의。
By means of a single-tube set-up, the influence of some factors, i.e.relative depth of jet hole in the gas distribution ( b/d) , interval distance between oscillatory tube and jet hole (δ) and misalignment angles between the central axises of nozzle and oscillatory tube (ψ) , on performance of pressure wave refrigerator were studied exper-imentally in this paper.In this experiment, the range of pressure ratioε=2~6, relative length of the oscillatory tube L/d=437.5 and jet flow pulsing frequency f=10~240Hz.The results showed that refrigeration efficiency of the pres-sure wave refrigerator (η) was firstly increased and then decreased when b/d was increased, but increasingδandψwould causeηsudden drop.Under the experimental condition in this paper, the recommend value of b/d was 0.5.