# Coverage for rocketcea\biprop_utils\rho_isp_plot_obj.py : 8%

## 329 statements 25 run 304 missing 0 excluded

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build an Isp frozen list mr_obj.mr_frozenL = [] # build an Isp frozen list mr_obj.sg_frozenL = [] # build an Isp frozen list for imr,mr in enumerate( mr_obj.mrL ): isp_frozen = run_cea_odf(mr_obj.mrLimitsObj.ispODEObj, Pc=Pc, MR=mr, eps=eps ) if isp_frozen > mr_obj.isp_min: mr_obj.isp_frozenL.append( isp_frozen ) mr_obj.mr_frozenL.append( mr ) sg = bulkDensity(oxName, fuelName, mr) mr_obj.sg_frozenL.append( sg ) def add_sg_isp_to_mr_obj( mr_obj ): oxName = mr_obj.mrLimitsObj.oxName fuelName = mr_obj.mrLimitsObj.fuelName mr_obj.sgL = [] # build a bulkDensity list mr_obj.sg_ispL = [] # build a rho * Isp list for imr,mr in enumerate( mr_obj.mrL ): sg = bulkDensity(oxName, fuelName, mr) mr_obj.sgL.append( sg ) mr_obj.sg_ispL.append( sg * mr_obj.isL[imr] ) mr_obj.sg_min = min( mr_obj.sgL ) mr_obj.sg_max = max( mr_obj.sgL ) def get_label_coordinates( mr_obj, sg_offset=0., is_offset=0.): sg = (mr_obj.sg_min + mr_obj.sg_max)/2.0 + sg_offset #isp = (mr_obj.isp_min + mr_obj.isp_max)/2.0 + is_offset isp = mr_obj.isp_max oxName = mr_obj.mrLimitsObj.oxName fuelName = mr_obj.mrLimitsObj.fuelName desc = oxName + '/' + fuelName return sg, isp, desc def min_max( M ): # return the min and max in matrix lo = np.min(M) hi = np.max(M) return lo, hi class RhoIspPlot( object ): def __init__(self, figsize=(10,8), dpi=70, Pc=500., eps=20., nsteps_sg=100, nsteps_isp=100, legend_loc='best', show_mr_on_plot=False, show_frozen_isp_on_plot=False, bipropL=None, monopropL=None, spec_gravD=None): if bipropL is None: bipropL = [('LOX','LH2'), ('N2O4','MMH'), ('LOX','RP1'), ('FLOX80','CH4'),('IRFNA','MHF3'), ('LOX','CH4'), ('F2','H2'), ('F2','N2H4'), ('CLF5','N2H4'),('N2F4','N2H4')] self.figsize = figsize self.dpi = dpi self.Pc = Pc self.eps = eps self.headline = 'Pc=%g psia, Area Ratio=%g:1'%(self.Pc, self.eps) self.nsteps_sg = nsteps_sg # controls grid on plot for interplating stage properties self.nsteps_isp = nsteps_isp # 'best', 'upper right', 'right', 'center', 'lower center', 'center right', etc. self.legend_loc = legend_loc self.show_mr_on_plot = show_mr_on_plot self.show_frozen_isp_on_plot = show_frozen_isp_on_plot self.bipropL = bipropL if monopropL is None: monopropL = [] self.monopropL = monopropL self.monoprop_sgIspD = {} #index:name, value:(sg, Isp) self.fig = plt.figure(figsize=figsize, dpi=dpi) # figsize=(NxM) inches self.added_props_to_plot = False if spec_gravD is not None: for key, val in spec_gravD.items(): add_prop_sg(name, val) self.mr_objL = [] self.isp_min = 9999.0 # initialize extents of plot self.isp_max = 0.0 self.sg_min = 9999.0 self.sg_max = 0.0 for (oxName, fuelName) in bipropL: if not got_sg(oxName): raise Exception('%s Specific Gravity Missing...\n'%oxName +\ ' add to spec_gravD["%s"]'%oxName) if not got_sg(fuelName): raise Exception('%s Specific Gravity Missing...\n'%fuelName +\ ' add to spec_gravD["%s"]'%fuelName) tobj = MR_Temperature_Limits(oxName=oxName, fuelName=fuelName, TC_LIMIT=1500.0, PcNominal=Pc, epsNominal=eps, MR_MIN=0.0, MR_MAX=200.0) self.mr_objL.append( MR_Peak_At_EpsPc(tobj, pc=Pc, eps=eps) ) add_sg_isp_to_mr_obj( self.mr_objL[-1] ) if show_frozen_isp_on_plot: add_frozen_isp_to_mr_obj( self.mr_objL[-1], Pc=Pc, eps=eps ) self.isp_min = min(self.isp_min, self.mr_objL[-1].isp_min) self.isp_max = max(self.isp_max, self.mr_objL[-1].isp_max) self.sg_min = min(self.sg_min, self.mr_objL[-1].sg_min) self.sg_max = max(self.sg_max, self.mr_objL[-1].sg_max) for propName in self.monopropL: sg = get_sg( propName ) if sg is not None: self.sg_min = min(self.sg_min, sg) self.sg_max = max(self.sg_max, sg) ispObj = CEA_Obj( propName=propName) Isp = ispObj.get_Isp(Pc=Pc, eps=eps) self.isp_min = min(self.isp_min, Isp) self.isp_max = max(self.isp_max, Isp) self.monoprop_sgIspD[propName] = (sg, Isp) self.rhobRange = self.sg_max - self.sg_min self.ispRange = self.isp_max - self.isp_min def add_stage_param_contours(self, stg_obj, set_param='DeltaV', param_value=2000.0, plot_paramL=None, # can be any of ['DeltaV', 'GLOW', 'VolPropellant', 'WtPropellant', 'WtInert'] plot_param_valD=None, # e.g. {'GLOW':[100, 200, 300]} label_frac_posD=None, # e.g. {'GLOW':0.1} num_ticks=10): # used in "pretty" ranges if plot_param_valD is None: plot_param_valD = {} if label_frac_posD is None: label_frac_posD = {} if plot_paramL is None: if set_param != 'GLOW': plot_paramL = ['GLOW'] else: plot_paramL = ['DeltaV'] line2 = 'Pc=%g psia, Area Ratio=%g:1'%( self.Pc, self.eps) callD = {set_param:param_value} # e.g. {'DeltaV':2100.0} if set_param == 'DeltaV': self.headline = stg_obj.stage_desc + '\nDeltaV=%g ft/sec, %s'%(param_value, line2) call_func = stg_obj.setDeltaV elif set_param == 'VolPropellant': s = '%g'%param_value if 'e' in s: s = '%g'%(param_value/1728.0,) self.headline = stg_obj.stage_desc + '\nVolPropellant=%s ft^3, %s'%(s, line2) else: self.headline = stg_obj.stage_desc + '\nVolPropellant=%g in^3, %s'%(param_value, line2) call_func = stg_obj.setVolPropellant elif set_param == 'WtPropellant': self.headline = stg_obj.stage_desc + '\nWtPropellant=%g lbm, %s'%(param_value, line2) call_func = stg_obj.setWtPropellant elif set_param == 'WtInert': self.headline = stg_obj.stage_desc + '\nWtInert=%g lbm, %s'%(param_value, line2) call_func = stg_obj.setWtInert elif set_param == 'GLOW': self.headline = stg_obj.stage_desc + '\nGLOW=%g lbm, %s'%(param_value, line2) call_func = stg_obj.setGLOW else: print('ERROR... did not recognize set_param="%s" in add_stage_param_contours'%set_param) sys.exit() # build a grid of values. # set one of DeltaV, VolPropellant, WtPropellant, WtInert, calculate the rest. sgArr = np.linspace(self.sg_min, self.sg_max, self.nsteps_sg) isArr = np.linspace(self.isp_min, self.isp_max, self.nsteps_isp) #print 'sgArr =',sgArr #print 'isArr =',isArr #print '-'*55 # create empty matrices to receive state data dvMatrix = np.empty(shape=(self.nsteps_sg, self.nsteps_isp), dtype=np.float64) volMatrix = np.empty(shape=(self.nsteps_sg, self.nsteps_isp), dtype=np.float64) wpMatrix = np.empty(shape=(self.nsteps_sg, self.nsteps_isp), dtype=np.float64) wiMatrix = np.empty(shape=(self.nsteps_sg, self.nsteps_isp), dtype=np.float64) glowMatrix = np.empty(shape=(self.nsteps_sg, self.nsteps_isp), dtype=np.float64) muMatrix = np.empty(shape=(self.nsteps_sg, self.nsteps_isp), dtype=np.float64) bad_ijL = [] # keep a list of i,j positions that fail for i, sg in enumerate(sgArr): for j, isp in enumerate(isArr): callD['sg'] = sg callD['Isp'] = isp call_func( **callD ) if stg_obj.DeltaV is None: bad_ijL.append( (i,j) ) dvMatrix[i][j] = 0 volMatrix[i][j] = 0 wpMatrix[i][j] = 0 wiMatrix[i][j] = 0 glowMatrix[i][j] = 0 muMatrix[i][j] = 0 else: dvMatrix[i][j] = stg_obj.DeltaV volMatrix[i][j] = stg_obj.VolPropellant wpMatrix[i][j] = stg_obj.WtPropellant wiMatrix[i][j] = stg_obj.WtInert glowMatrix[i][j] = stg_obj.GLOW muMatrix[i][j] = stg_obj.MassFrac #print 'bad_ijL =',bad_ijL #print 'glowMatrix' #for i in range(len(sgArr)): # print glowMatrix[i] #print 'glow min, max=',min_max( glowMatrix ) #print 'MassFrac min, max=',min_max( muMatrix ) # ================================== def build_a_contour_curve( target_val, M ): xyPlotL = [] # list of (x,y) pairs to be plotted i.e. (sg, Isp) for i, sg in enumerate(sgArr): is_ans = find_first_terp( target_val, M[i], isArr ) #print 'is_ans =',is_ans if is_ans is not None: xyPlotL.append( (sgArr[i], is_ans) ) for j, isp in enumerate(isArr): sg_ans = find_first_terp( target_val, M[:,j], sgArr ) #print 'sg_ans =',sg_ans if sg_ans is not None: xyPlotL.append( (sg_ans, isArr[j]) ) if xyPlotL: xyPlotL.sort() return xyPlotL # ================================== def build_contour_curves( valueL, M): xyL = [] # list of tuples (val, xyPlotL) for val in valueL: #print 'making xyPlotL for val =',val xyPlotL = build_a_contour_curve( val, M ) if xyPlotL: xyL.append( (val, xyPlotL) ) return xyL # ================================== def add_curves_to_figure( xyL, color=(.5,0,0), alpha=0.5, label='', units='lbm', line_style='--', label_frac_pos=0.3): for (val, xyPlotL) in xyL: xL = [v[0] for v in xyPlotL] yL = [v[1] for v in xyPlotL] s = '%g %s'%(val, units) bbox = {'fc':(1,1,1), 'pad':0, 'facecolor':'w', 'edgecolor':'w', 'alpha':alpha} propsD = {'ha':'center', 'va':'center', 'bbox':bbox} if label: plt.plot(xL, yL, line_style, color=color, label=label) label = '' else: plt.plot(xL, yL, line_style, color=color) #ipos = min(len(xL)-1, max(0, int( label_frac_pos * len(xL) ))) ipos = label_frac_ipos( xL, yL, self.rhobRange, self.ispRange, label_frac=label_frac_pos ) rotationAng = getLocalAngle( xL[ipos], xL, yL, self.rhobRange, self.ispRange, self.figsize ) plt.text(xL[ipos], yL[ipos], s, fontdict=propsD, rotation=rotationAng, color=color) # ================================== def build_valueL_xyL( pname, M ): if pname in plot_param_valD: valueL = plot_param_valD[pname] else: lo, hi = min_max( M ) lo, hi, step = calcMinMaxRange(lo, hi, num_ticks=num_ticks) #print 'lo, hi, step =',lo, hi, step valueL = list( np.arange(lo, hi, step) ) xyL = build_contour_curves( valueL, M) return xyL # plot each of the parameters if 'DeltaV' in plot_paramL: xyL = build_valueL_xyL( 'DeltaV', dvMatrix ) add_curves_to_figure( xyL, color=(0,0.5,0.5), alpha=0.5, label=r'$\Delta V$' , units='ft/s', line_style=':', label_frac_pos=label_frac_posD.get('DeltaV',0.3) ) if 'GLOW' in plot_paramL: xyL = build_valueL_xyL( 'GLOW', glowMatrix ) add_curves_to_figure( xyL, color=(.5,0,0), alpha=0.5, label='GLOW', units='lbm', line_style=':', label_frac_pos=label_frac_posD.get('GLOW',0.3) ) if 'VolPropellant' in plot_paramL: xyL = build_valueL_xyL( 'VolPropellant', volMatrix ) add_curves_to_figure( xyL, color=(.5,0,.5), alpha=0.5, label=r'$V_{prop}$', units=r'$in^3$', line_style='--', label_frac_pos=label_frac_posD.get('VolPropellant',0.3) ) if 'CubicFt' in plot_paramL: xyL = build_valueL_xyL( 'CubicFt', volMatrix/1728.0 ) add_curves_to_figure( xyL, color=(.5,0,.5), alpha=0.5, label=r'$V_{prop}$', units=r'$ft^3$', line_style='--', label_frac_pos=label_frac_posD.get('CubicFt',0.3) ) if 'WtPropellant' in plot_paramL: xyL = build_valueL_xyL( 'WtPropellant', wpMatrix ) add_curves_to_figure( xyL, color=(0,.5,0), alpha=0.5, label=r'$W_{prop}$', units='lbm', line_style='--', label_frac_pos=label_frac_posD.get('WtPropellant',0.3) ) if 'WtInert' in plot_paramL: xyL = build_valueL_xyL( 'WtInert', wiMatrix ) add_curves_to_figure( xyL, color=(0,0,.5), alpha=0.5, label='Winert', units='lbm', line_style='--', label_frac_pos=label_frac_posD.get('WtInert',0.3) ) if 'MassFrac' in plot_paramL: xyL = build_valueL_xyL( 'MassFrac', muMatrix ) add_curves_to_figure( xyL, color=(.5,.5,0), alpha=0.5, label=r'$\mu_{stg}$', units=r'$\mu$', line_style=':', label_frac_pos=label_frac_posD.get('MassFrac',0.3) ) plt.legend( loc=self.legend_loc ) def add_rho_isp_contours(self, label_frac_pos=0.3, num_ticks=10): sgArr = np.linspace(self.sg_min, self.sg_max, self.nsteps_sg) isArr = np.linspace(self.isp_min, self.isp_max, self.nsteps_isp) dsg = self.rhobRange / self.nsteps_sg disp = self.ispRange / self.nsteps_isp sgIslo, sgIshi, sgIsstep = calcMinMaxRange(self.sg_min*self.isp_min, self.sg_max*self.isp_max, num_ticks=num_ticks) label = r'$\rho$ Isp' val = sgIslo + sgIsstep while val < sgIshi: xyPlotL = [] for sg in sgArr: isp_test = val / sg if isp_test>self.isp_min and isp_test<self.isp_max: xyPlotL.append( (sg, isp_test) ) for isp in isArr: sg_test = val / isp if sg_test>self.sg_min and sg_test<self.sg_max: xyPlotL.append( (sg_test, isp) ) xyPlotL.sort() c = (.2,.2,.2,.2) s = '%g %s'%(val, r'$\rho$ Isp') bbox = {'fc':(1,1,1,0.8), 'pad':0, 'facecolor':'w', 'edgecolor':'w'} propsD = {'ha':'center', 'va':'center', 'bbox':bbox} if xyPlotL: xL = [xy[0] for xy in xyPlotL] yL = [xy[1] for xy in xyPlotL] plt.plot(xL, yL, '--', color=c) if label: plt.plot(xL, yL, '--', color=c, label=label) label = '' else: plt.plot(xL, yL, '--', color=c) #ipos = min(len(xL)-1, max(0, int( label_frac_pos * len(xL) ))) ipos = label_frac_ipos( xL, yL, self.rhobRange, self.ispRange, label_frac=label_frac_pos ) rotationAng = getLocalAngle( xL[ipos], xL, yL, self.rhobRange, self.ispRange, self.figsize ) plt.text(xL[ipos], yL[ipos], s, fontdict=propsD, rotation=rotationAng, color='k') val += sgIsstep def add_propellants(self): if self.added_props_to_plot: return # properties for MR labels bbox = {'fc':(1,1,1,0.8), 'pad':4, 'facecolor':'w', 'edgecolor':'w'} mr_propsD = {'ha':'center', 'va':'bottom', 'bbox':bbox, 'fontsize':14} mr_frozen_propsD = {'ha':'center', 'va':'top', 'bbox':bbox, 'fontsize':14} self.added_props_to_plot = True for i, obj in enumerate( self.mr_objL ): c = colorL[i % len(colorL)] plt.plot(obj.sgL, obj.isL, '-', color=c, linewidth=3) if self.show_frozen_isp_on_plot: plt.plot(obj.sg_frozenL, obj.isp_frozenL, '-', color=c, linewidth=3) sg, isp, desc = get_label_coordinates( obj, sg_offset=0., is_offset=0.) propsD = {'ha':'center', 'va':'bottom', 'color':c, 'weight':'bold', 'fontsize':12} plt.text(sg, isp, desc, fontdict=propsD) if self.show_mr_on_plot: # add MR labels to curve ileft = int(len(obj.mrL)/10) iright = len(obj.mrL) - int(ileft/2) mrlo, mrhi, mrstep = calcMinMaxRange(obj.mrL[0], obj.mrL[-1], num_ticks=10) mr_isp_terp = InterpProp(obj.mrL, obj.isL) mr_sg_terp = InterpProp(obj.mrL, obj.sgL) mr = mrlo #print 'showing MR for',desc,'mrlo, mrhi, mrstep=',mrlo, mrhi, mrstep s = 'MReq=' while mr < mrhi+mrstep/2.: if mr>=obj.mrL[ileft] and mr<=obj.mrL[iright]: sg = mr_sg_terp( mr ) Isp = mr_isp_terp( mr ) rotationAng = getLocalAngle( sg, obj.sgL, obj.isL, self.rhobRange, self.ispRange, self.figsize ) plt.text( sg, Isp, s+'%g'%mr, fontdict=mr_propsD, rotation=rotationAng, color=c) s = '' mr += mrstep if self.show_frozen_isp_on_plot: ileft = int(len(obj.mr_frozenL)/10) iright = len(obj.mr_frozenL) - int(ileft/2) mrlo, mrhi, mrstep = calcMinMaxRange(obj.mr_frozenL[0], obj.mr_frozenL[-1], num_ticks=6) mr_isp_terp = InterpProp(obj.mr_frozenL, obj.isp_frozenL) mr_sg_terp = InterpProp(obj.mr_frozenL, obj.sg_frozenL) mr = mrlo #print 'showing MR for',desc,'mrlo, mrhi, mrstep=',mrlo, mrhi, mrstep s = 'MRfroz=' while mr < mrhi+mrstep/2.: if mr>=obj.mr_frozenL[ileft] and mr<=obj.mr_frozenL[iright]: sg = mr_sg_terp( mr ) Isp = mr_isp_terp( mr ) rotationAng = getLocalAngle( sg, obj.sg_frozenL, obj.isp_frozenL, self.rhobRange, self.ispRange, self.figsize ) plt.text( sg, Isp, s+'%g'%mr, fontdict=mr_frozen_propsD, rotation=rotationAng, color=c) s = '' mr += mrstep for propName, (sg, Isp) in self.monoprop_sgIspD.items(): plt.plot([sg], [Isp], 'o', color='b', markersize=10) propsD = {'ha':'center', 'va':'bottom', 'color':'b', 'weight':'bold'} plt.text(sg, Isp+2, propName, fontdict=propsD) plt.xlabel('Specific Gravity (g/ml)') plt.ylabel('CEA IspVac (sec)') plt.title(self.headline) def show(self): self.add_propellants() plt.show() def savefig(self, fname, dpi=120): self.add_propellants() plt.savefig(fname, dpi=dpi) if __name__=="__main__": from veh_stage_obj import ConstMassFracStage #rp = RhoIspPlot() rp = RhoIspPlot(bipropL=[('LOX','LH2'),('N2O4','MMH')], nsteps_sg=90, nsteps_isp=90) stg_obj = ConstMassFracStage( mass_frac=0.8, WtPayload=1000.0 ) rp.add_rho_isp_contours() #rp.add_stage_param_contours( stg_obj, set_param='GLOW', param_value=2000.0, # plot_paramL=['DeltaV']) rp.add_stage_param_contours( stg_obj, set_param='DeltaV', param_value=7200.0, plot_paramL=['GLOW'], num_ticks=16) rp.show()