Demonstrate blow down. Most satellites use unregulated blowdown systems.

By choosing the appropriate tank volume you can get the desired
blowdown ratio. This demo will show a blowdown curve. Most spacecraft
use these kind of systems. The blowdown ratio is determined by the
thruster pressure limits.

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See also Constant, Plot2D, MolWt, BloDown, MolWt2R
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%-------------------------------------------------------------------------------
%   Copyright (c) 1994-1998 Princeton Satellite Systems, Inc.
%   All rights reserved.
%-------------------------------------------------------------------------------
%   Since version 1.
%-------------------------------------------------------------------------------

Nm2ToPSI = Constant('N/m^2 to PSI');
KgToLbF  = Constant('Kg to Lb Force');
molWt    = 0.004;             % Molecular weight
rPress   = MolWt2R(molWt);    % Gas constant
mFuel    = linspace(0,200);   % Fuel mass
rhoFuel  = 1000;              % Fuel density
T        = 293;               % Tank temperature
vTank    = 0.5;               % Volume of tank
mPress   = 1.2;               % Mass of pressurant
p        = BloDown(mPress,rhoFuel,vTank,rPress,T,mFuel);

Plot2D(mFuel*KgToLbF,p*Nm2ToPSI,'Mass Fuel (lb)','Pressure (psi)')


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