/**
* This function plots the airfoil drag polar using a parabolic approssimation.
*
* @author Manuela Ruocco
*/
public void plotPolar() {
System.out.println("\n \n-----------------------------------------------------");
System.out.println("STARTING PLOT AIRFOIL DRAG POLAR");
System.out.println("-----------------------------------------------------");
MyArray alphaArray = new MyArray();
int _numberOfAlpha = 40;
double[] cdArrayPolar = new double[_numberOfAlpha];
double[] clArrayPolar = new double[_numberOfAlpha];
Amount<Angle> alphaActualAmount;
Amount<Angle> alphaStart = Amount.valueOf(toRadians(-6.), SI.RADIAN);
Amount<Angle> alphaEnd = Amount.valueOf(toRadians(12.), SI.RADIAN);
alphaArray.setDouble(
MyArrayUtils.linspace(
alphaStart.getEstimatedValue(), alphaEnd.getEstimatedValue(), _numberOfAlpha));
String folderPathPolar =
MyConfiguration.currentDirectoryString + File.separator + "out" + File.separator;
String subfolderPathPolar =
JPADStaticWriteUtils.createNewFolder(folderPathPolar + "Polar_Airfoil" + File.separator);
for (int i = 0; i < _numberOfAlpha; i++) {
alphaActualAmount = Amount.valueOf(alphaArray.get(i), SI.RADIAN);
clArrayPolar[i] = calculateClAtAlpha(alphaActualAmount.getEstimatedValue());
cdArrayPolar[i] = calculateCdAtAlpha(alphaActualAmount);
}
MyChartToFileUtils.plotNoLegend(
cdArrayPolar,
clArrayPolar,
null,
null,
null,
null,
"Cd",
"Cl",
"",
"",
subfolderPathPolar,
"Polar_Airfoil ");
System.out.println("\n \n-----------------------------------------------------");
System.out.println("DONE");
System.out.println("-----------------------------------------------------");
}
public void plotClvsAlpha(String subfolderPath, String name) {
System.out.println("\n \n-----------------------------------------------------");
System.out.println("STARTING PLOT AIRFOIL CL vs ALPHA CURVE " + name);
System.out.println("-----------------------------------------------------");
MyArray alphaArray = new MyArray();
int _numberOfAlpha = 60;
double[] clArray = new double[_numberOfAlpha];
double[] alphaArrayDeg = new double[_numberOfAlpha];
Amount<Angle> alphaActualAmount;
Amount<Angle> alphaStart = Amount.valueOf(toRadians(-6.), SI.RADIAN);
Amount<Angle> alphaEnd = Amount.valueOf(toRadians(25.0), SI.RADIAN);
alphaArray.setDouble(
MyArrayUtils.linspace(
alphaStart.getEstimatedValue(), alphaEnd.getEstimatedValue(), _numberOfAlpha));
for (int i = 0; i < _numberOfAlpha; i++) {
alphaActualAmount = Amount.valueOf(alphaArray.get(i), SI.RADIAN);
clArray[i] = calculateClAtAlpha(alphaActualAmount.getEstimatedValue());
alphaArrayDeg[i] = alphaActualAmount.to(NonSI.DEGREE_ANGLE).getEstimatedValue();
}
MyChartToFileUtils.plotNoLegend(
alphaArrayDeg,
clArray,
null,
null,
null,
null,
"alpha",
"CL",
"deg",
"",
subfolderPath,
"CL vs alpha Airfoil" + name);
System.out.println("-----------------------------------------------------");
System.out.println("\n DONE");
System.out.println("-----------------------------------------------------");
}
