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clear
clc
format long
%ÔÚÒÔÏÂѹÁ¦¡¢Î¶ÈÒÔ¼°×é·ÖÌõ¼þÏ£¬µªÑõÁ½×é·ÝÂú×ãÏàÆ½ºâ£¬ÏàÆ½ºâ³£ÊýKN=1.14£¬Õâ¶Î³ÌÐòÊÇΪÁËѧϰ²¢ÑéÖ¤PR·½³Ì

p=5.23e5;    %ѹÁ¦
T=96.6;    %ζÈ
yN=0.904;  %ÆøÏ൪×é·Ö
yO=1-yN;    %ÆøÌ¬Ñõ×é·Ö
xN=0.793;     %Һ̬µª×é·Ö
xO=1-xN;    %Һ̬Ñõ×é·Ö

%ÎïÐÔ»ù±¾³£Êý
%N2
TcN=126.2;  %ÁÙ½çζÈ
pcN=34e5;   %ÁÙ½çѹÁ¦
wN=0.03726; %Æ«ÐÄÒò×Ó
RN=296.8;   %ÆøÌå³£Êý
mN=0.37464+1.54226*wN-0.26992*wN^2; %ÓÃÀ´¼ÆËãPR·½³ÌÖеÄa(T)

%O2
TcO=154.58; %ͬµªÆø
pcO=50.43e5;
wO=0.022;
RO=259.84;
mO=0.37464+1.54226*wO-0.26992*wO^2;

%PR·½³Ì²ÎÊýÇóÈ¡
%N2

TrN=T/TcN;  %¶Ô±ÈζÈ
alphaN=(1+mN*(1-TrN^0.5))^2;    %ÓÃÀ´Çóa(T)
acN=0.45724*RN^2*TcN^2/pcN;     %ÓÃÀ´Çóa(T)
aN=acN*alphaN;                  %a(T)¼ÆËãʽ
bN=0.0778*RN*TcN/pcN;           %b¼ÆËãʽ
AN=aN*p/(RN^2*T^2);             %A¼ÆËãʽ
BN=bN*p/RN/T;                   %B¼ÆËãʽ

aaN=BN-1;
bbN=AN-2*BN-3*BN^2;
ccN=BN^3+BN^2-AN*BN;            %ÒÔÉÏÈý¸ö²ÎÊýÓÃ×öÇóÌå»ýѹËõÂʵĶàÏîʽϵÊý

%O2  ×¢ÊÍͬµªÆø
TrO=T/TcO;
alphaO=(1+mO*(1-TrO^0.5))^2;
acO=0.45724*RO^2*TcO^2/pcO;
aO=acO*alphaO;
bO=0.0778*RO*TcO/pcO;
AO=aO*p/(RO^2*T^2);
BO=bO*p/RO/T;

aaO=BO-1;
bbO=AO-2*BO-3*BO^2;
ccO=BO^3+BO^2-AO*BO;

%»ìºÏ¹æÔò

%ÆøÏà
kNO=-0.023644+0.15427e-3;   %Á½Ôª½»»¥Òò×Ó
am=yN*yN*aN+yO*yO*aO+2*yN*yO*sqrt(aN*aO)*(1-kNO);   %»ìºÏa
% am=(yN*sqrt(aN)+yO*sqrt(aO))^2;
bm=yN*bN+yO*bO;                                     %»ìºÏÎïµÄb
Am=am*p/(RN^2*T^2);
Bm=bm*p/RN/T;

aam=Bm-1;
bbm=Am-2*Bm-3*Bm^2;
ccm=Bm^3+Bm^2-Am*Bm;     %ÒÔÉÏÈý¸ö²ÎÊýÓÃ×öÇóÌå»ýѹËõÂʵĶàÏîʽϵÊý


%ÒºÏà
am1=xN*xN*aN+xO*xO*aO+2*xN*xO*sqrt(aN*aO)*(1-kNO);
bm1=xN*bN+(1-xN)*bO;
Am1=am1*p/(RN^2*T^2);
Bm1=bm1*p/RN/T;

aam1=Bm1-1;
bbm1=Am1-2*Bm1-3*Bm1^2;
ccm1=Bm1^3+Bm1^2-Am1*Bm1;



%ÇóÌå»ýѹËõÒò×Ó
n=[1,aam,bbm,ccm];
z=roots(n)
n1=[1,aam1,bbm1,ccm1];
z1=roots(n1)


%ÇóÁ½ÏàN2µÄÒݶÈ


phi_yN=exp(bN*(z-1)/bm-log(z-Bm)-Am/(2*sqrt(2))*((2*(yO*sqrt(aN*aO)+yN*sqrt(aN*aN)))/am-bN/bm)*(log((z+2.414*Bm)./(z+0.414*Bm))))
phi_xN=exp(bN*(z1-1)/bm1-log(z1-Bm1)-Am1/(2*sqrt(2))*((2*((1-xN)*sqrt(aN*aO)+xN*sqrt(aN*aN)))/am1-bN/bm1)*(log((z1+2.414*Bm1)./(z1+0.414*Bm1))))


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