39,5 25 :16728785(2018)05002506 30 犓 <= 犆犉犇 +,78 1,2 1,2 T 1,2 1 (1.,( 100049; 2., 200083) :2 U 29M,;2 9M$7+ 2Z<80K, Z<30K,=29Mc,bR2+9M W$ ^'(ComputerFluidDynamics,CFD)9M $9MEZ<<+ N,9MW$(9 M+EZ<;=,^) R2 9M%W$,0.7W@30K 27W@80K AW, PV 133 W;c=2c9M%,PV 133W,1.2W@30K 26W @80K AW N,U 29M R%9M$V+^ :;9M$;CFD :TB651 :A 犇犗犐 :10.3969/j.issn.16728785.2018.05.005 犆犉犇犛犻犿狌犾犪狋犻狅狀犛狋狌犱狔狅犳犘狉犲犮狅狅犾犻狀犵狅犳犪犘狌犾狊犲犜狌犫犲犪狋 30 犓 YANGSen 1,2,LIUBiqiang 1,2,JIANGZhenhua 1,2,WUYinong 1 (1. 犝狀犻狏犲狉狊犻狋狔狅犳犆犺犻狀犲狊犲犃犮犪犱犲犿狔狅犳犛犮犻犲狀犮犲狊, 犅犲犻犼犻狀犵 100049, 犆犺犻狀犪 ; 2. 犛犺犪狀犵犺犪犻犐狀狊狋犻狋狌狋犲狅犳犜犲犮犺狀犻犮犪犾犘犺狔狊犻犮狊, 犆犺犻狀犲狊犲犃犮犪犱犲犿狔狅犳犛犮犻犲狀犮犲狊, 犛犺犪狀犵犺犪犻 200083, 犆犺犻狀犪 ) 犃犫狊狋狉犪犮狋 :AimingattheprecoolingofthepulsetubeofaUtypehybridcryocoolerwithaonestageStirling andatwostagepulsetube,theinfluencefactorsonthecryocoolerarestudied.whenthecoolingtemperature ofthesecondstageis30k,thefirststagecoldfingerisconnectedtothepulsetubeviaaheatbridgeandthe coolingcapacityprovidedbythefirststageisusedtoprecoolthepulsetube.theinfluenceofpulsetubepre coolingonthetemperaturefieldandvelocityfieldinthepulsetubeisstudiedbyafluentsoftware.itisfound thatprecoolingmaychangetheinternaltemperaturedistributionofthepulsetubeandhasagreatinfluenceon thecoolingcapacityofthesecondstage.withouttheprecoolingofthepulsetubebythecoolingcapacitypro videdbythefirststage,thecryocooleroutputsitscoolingcapacitywithitssecondstageof0.7w@30kand itsfirststageof7w@80katthesametimeandtheinputpvpowerofthecompressoris133w.afterthe firststagecoldheatexchangerisconnectedtothemiddlepartofthesecondstagevesselviaaheatbridge,the inputpvpowerof133wismaintainedandtheoutputcoolingcapacityofthesecondstageandthatofthefirst!"#:20180323 :(1990),,,,\Z+;3 Email:yangsen7890@126.com
26 20185 stagearechangedto1.2w@30kand6w@80krespectivelyatthesametime.itisfoundthattheprecoo lingofthemiddlesectionofthepulsetubecangreatlyimprovethetwostagecoolingcapacityoftheutype hybridcryocooler. 犓犲狔狑狅狉犱狊 :twostagehybridcryocooler;precoolingofpulsetube;cfd 0 F3!',K!"#" F ;"#,F3!"#"]4*YP K+[:;<LMP* P (Pulse Tube Refrigerator, PTR)R5T4JPY <,ST-.7 F W F GZ[,H,OI Y FGZILT<[ AJ[ F 3 K Y, Y L 5 M 5NZO,;!" #<DAZYPH NGAS6P\%UA F3+:&" 5! " # " (AtmosphericInfraredSounder,AIRS)Z " #,H\]%UM7 Y!"#7"# _#,%&&8.&'DY!"#P* PF"#', "#:Y,6F"# P*NNP /F 3QROS#(VeryLongBase lineinterferometry,vlbi) 8 9 P*30K [7^?4:,H Y!"#++P*+L QL,76PG P /,,35K 6T$80K - FPF "#[FG @F3APY P' K:Y30K P,34*G-. 30, UV"#:;LT [YP',Y!" #"#^_A P@:6Y 50K K Y, 3 4 *! PHPIJPY P >?PHPP=,PPIJ;Q 2015, W Z * N XKPLMP,180W, U)<,675mW@20K P F [1] 2016, Y Jiho ParkZ*NXKLMP [2], PYB(38.5K) 2017, ZKGWQP$ L M ' : ; [3] -N, R W Q P $3,KPG WQPF[< QP XK6 U QP, 6 * Z -., P ; 80 K,*4[F5\LM:, P;30K 56P68,!6PKLMP 3 6PKLMPIJ PP $Q7KP4 L M, F $ Q 7,5TZ ]2I,P ]$Q,7^1PK4 _% X3, U
39,5 27 Q6Z CFD-.$Q, PKPF 1 ; XK6 U Q6Z BP 5ZP:;6, * U QP-. P <;30K 300K,6 3 )LM8 P-. /011 01 P-.70 U Q3$3LM 8,,6P`) 6P`:;80K,6; 30K,6;300K P`3 =LM8, : 6 < K : _ % 02(a);P 6:, R Δ 犎 = 犎狆狋 - 犮狅犾犱 - 犎狉犲犵 = 犙犮 - 犠犆犎犡 (1) J, 犎狆狋 - 犮狅犾犱 ;Pa, 犎狉犲犵 ; Pa, 犙犮 ;P (P ), 犠犆犎犡 ; K!bU R K! U ; 3, J (1)N1; 犙犮 = 犎狆狋 - 犮狅犾犱 - 犎狉犲犵 (2) PP7N; $Pa,0 2(b)6N ; 犎狆狋 - 犺狅狋 - 犎狆狋 - 犮狅犾犱 = 犙狆狋 (3) J, 犎狆狋 - 犺狅狋 ;a, 犙狆狋 ;!; cj(2) J(3), L65P6PN; 犙犮 = 犎狆狋 - 犺狅狋 - 犎狉犲犵 - 犙狆狋 (4),K U Q6ZB P,36P6), 8, 6 P K L M P, 犙狆狋 ;BR,7 犙犮 2 7PQ X! Fluent<K U Q6 ZBPLMWK47,$,6*ZP, 3 :80K ;* U Q P-.,!6PK LMP,[F5\:300K 03 -.$Q-. 02 P6 STU9P-./0 31 X! Fluent < K S T U 9PLM#,$ k-ω$q,5*5
28 20185 I,DE @;# X* SIMPLEC $; Z5;2.4 MPa, :E;40Hz KZ LM-., #(UserDe finedfunction,udf)u Z4;3# Z43:=θ,I; 犞犮狅犿狆狉犲狊狅狉 = 犞犪犿狆 sin(2π 犳狋 ) (5) 犞犱犻狊狆犾犪犮犲狉 = 犞 犪犿狆 sin(2π 犳狋 +θ) (6) K,*6$Q LM-.,9#I; { } 狊犻 =- 犪 μ 狏犻 + 1 犆 2 2 ρ 狏 狏 (7) 犻 3 c; 3 U Q6ZBP -.,K:LM -. - N, 5 ; 6.36 cc,u973 :=, H*6PK)LMP, 0.7W@30K 67W@80K LMP ),)PVU;133W 56$ ap60mm LM8, ) PV U;133 W,)P; 1.2W@30K 66W@80K LMP) 3.1 O`F 5;6.36cc, U973 :=,H6$ ap60mm LM8, P4/041 04 P40 04'1P 7[46P P +;30K 300K PT65 P` 3+, 5P` LM ; 5L,45L M 5 $P PT' 3.2 F ;PK45:,KLMP60mm LMPG<LM 05 PK4 KLMP60mm LM PG<,6= /051 06 WX CFD-., P 4,PM IX,DP a,p@e 3.3 O`JQ6 3 U Q6ZB
39,5 29 P6P`KLMP,7 P`P bv6 P,TT6[P=,^ @GP 56$WX=8,K = L M P, ) PV U ; 133 W,Z1:= ;78 犜犺 - 犜 c1 犜犺 - 犜 c2 5 狉犆犗犘 = 犙 c1 + 犙 c2 / 犠 犜 c1 犜 c2 ;@@E, 犙 c1; 6 P, 犙 c2;p, 犜 c1;6:, 犜 c2; :, 犜 h; 07 P$P=; -.,P=!K P@ U Q6Z BP+;30K 300 K,6P`:;80K, LM8,30K 80K ),356P`$)LM 8,K!LMP),L6 YP6F 56P`$80 K300K )LM8,6P` K)P,3V6PK LMP /081,) PV U;133 W H *6PK)LMP,U Q6 ZBP70.7W@30K 7W@80K LMP),@ 08 @E$P=; @E;19.22% 56P`$ 60mm LM8,)PV U ;133W,)P;1.2W@30K 6W @80K LMP),@ @E;20.46% 4 ' U Q6ZGB PP6-. CFD -. -N,U Q6ZG BPSTG)P ;=PKG)P 3P=7 @@E (1)PY-.,36K P,766P P,-.STW.7 <[ (2)3P=,7K 6GP`P)L M,F3PY!"# P (3)]#R2I7^ 1PM4 ^1P PF,;PY P[a2-5T U Q6ZG BP-.a2[
30 20185 [1]W,,,Z.12K PQ P [J].Q,2015,43(12):69. [2]JihoP,JunseokK,JeongminC,etal.Stirlingtype PulseTube Refrigerator(PTR)withColdCom pression:coldcompressor,colderexpander[j]. 犆狉狔狅犵犲狀犻犮狊,2016,74:6672. [3],,,Z.GWQ P $ $ c $ [J].TU,2017,28(3):4348. (7) 011 A ScenebasedTechniques [C]. 犛犘犐犈.1990,1308: 224233. [6]TomasiC.BilateralFilteringforGrayandColor Image[C].Bombay:6thInternationalConference oncomputervision,1998. [7].LQL"# F? [ [J]. P,2002,23 (8):2429. [8]. P! " # Y % &, ( [D].`:`+',2015.