Projeto Conceitual de Aeronaves de Transporte
Projeto Conceitual de Aeronaves de Transporte
Projeto Conceitual de Aeronaves de Transporte
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O código MATLAB que foi escrito para gerar os gráficos das Figs. I.5 e I.6 é dado a<br />
seguir:<br />
%*********************************************************************<br />
% Estimativa do consumo <strong>de</strong> combustivel em cruzeiro do Fokker 100<br />
%*********************************************************************<br />
clc<br />
% constantes<br />
kg2lb = 2.20462262; % fator <strong>de</strong> conversao coversao <strong>de</strong> kg para libra<br />
ft2m = 0.3048;% fator <strong>de</strong> conversao <strong>de</strong> p´s para metros<br />
cfe = 0.0030; % coef <strong>de</strong> fricao equivalente (Dado do Roskam)<br />
% Atmosfera<br />
rho35 = 0.37959; % Densida<strong>de</strong> do ar em 35000 pes (kg/m3)<br />
vsom35= 296.5388; % Velocida<strong>de</strong> do som em 35000 pes (m/s)<br />
rho31 = 0.44165; % Densida<strong>de</strong> do ar em 31000 pes (kg/m3)<br />
vsom31= 301.86; % Velocida<strong>de</strong> do som em 31000 pes (m/s)<br />
rho30 = 0.45831; % Densida<strong>de</strong> do ar em 30000 pes (kg/m3)<br />
vsom30= 303.177; % Velocida<strong>de</strong> do som em 30000 pes (m/s)<br />
% Dados da aeronave<br />
arw= 8.43; % Alongamento da asa<br />
sw=93.5; % Area da asa<br />
mtow=43090; % Masssa maxima <strong>de</strong> <strong>de</strong>colagem<br />
ftakeoff=0.995;<br />
fclimb=0.98;<br />
rangekm=1730; % (km)<br />
ct=0.69; % consumo especifico do motor em cruzeiro (1/h)<br />
%<br />
mtowlb=mtow*kg2lb;<br />
rangem=rangekm*1000;<br />
swft2=sw/(ft2m*ft2m);<br />
areamolhadaft2=0.0199+0.7531*log10(mtowlb);<br />
areamolhadaft2=10^areamolhadaft2;<br />
cd0=cfe*areamolhadaft2/swft2;<br />
oswa = 0.65;<br />
ncont=1;<br />
while oswa < 0.85<br />
e=oswa;<br />
oswplo(ncont)=oswa;<br />
cl_long=sqrt(pi*e*arw*cd0/3);<br />
cd =4*cd0/3;<br />
ld=cl_long/cd;<br />
% Velocida<strong>de</strong> <strong>de</strong> cruzeiro <strong>de</strong> longo alcance no inicio do cruz<br />
masscruzi=ftakeoff*fclimb*mtow; % (kg)<br />
vcruz35i=sqrt(masscruzi*9.81/(0.50*rho35*cl_long*sw));<br />
vcruz31i=sqrt(masscruzi*9.81/(0.50*rho31*cl_long*sw));<br />
vcruz30i=sqrt(masscruzi*9.81/(0.50*rho30*cl_long*sw));<br />
% fracao <strong>de</strong> massa no cruzeiro<br />
t1=sqrt(2/(rho30*sw));<br />
t2=(sqrt(cl_long))/cd;<br />
t3=3600/ct;<br />
sqqwf=-rangem/(2*t1*t3*t2)+sqrt(masscruzi*9.81);<br />
massfin=sqqwf^2/9.81;<br />
fmassa=massfin/masscruzi;<br />
mcomb=masscruzi-massfin;<br />
mcomb30plo(ncont)=mcomb;<br />
mach30plo(ncont)=vcruz30i/vsom30;<br />
teralt=rangem*ct/(3600*vcruz30i*ld);<br />
fmassalt=1/exp(teralt);<br />
%