Parasite Drag Functions

This group of API functions is supplemental to performing a Paraste Drag analysis through the Analysis Manager. They include functions to write out Parasite Drag Tool equations, calculate atmospheric properties, and control excrescences.

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Functions
void	AddExcrescence (const string &in excresName, const int &in excresType, const double &in excresVal)
void	DeleteExcrescence (const int &in excresName)
void	UpdateParasiteDrag ()
void	WriteAtmosphereCSVFile (const string &in file_name, const int &in atmos_type)
void	CalcAtmosphere (const double &in alt, const double &in delta_temp, const int &in atmos_type, double &out temp, double &out pres, double &out pres_ratio, double &out rho_ratio)
void	WriteBodyFFCSVFile (const string &in file_name)
void	WriteWingFFCSVFile (const string &in file_name)
void	WriteCfEqnCSVFile (const string &in file_name)
void	WritePartialCfMethodCSVFile (const string &in file_name)

Detailed Description

Function Documentation

AddExcrescence()

void AddExcrescence	(	const string &in	excresName,
		const int &in	excresType,
		const double &in	excresVal
	)

Add an Excresence to the Parasite Drag Tool

AddExcrescence( "Miscellaneous", EXCRESCENCE_COUNT, 8.5 );
 
AddExcrescence( "Cowl Boattail", EXCRESCENCE_CD, 0.0003 );

See also

EXCRES_TYPE

Parameters

[in]	excresName	Name of the Excressence
[in]	excresType	Excressence type enum (i.e. EXCRESCENCE_PERCENT_GEOM)
[in]	excresVal	Excressence value

CalcAtmosphere()

void CalcAtmosphere	(	const double &in	alt,
		const double &in	delta_temp,
		const int &in	atmos_type,
		double &out	temp,
		double &out	pres,
		double &out	pres_ratio,
		double &out	rho_ratio
	)

Calculate the atmospheric properties determined by a specified model at input altitude and temperature deviation. This function may not be used for any manual atmospheric model types (i.e. ATMOS_TYPE_MANUAL_P_T). This function assumes freestream units are metric, temperature units are Kelvin, and pressure units are kPA.

double temp, pres, pres_ratio, rho_ratio;
 
double alt = 4000;
 
double delta_temp = 0;
 
CalcAtmosphere( alt, delta_temp, ATMOS_TYPE_US_STANDARD_1976, temp, pres, pres_ratio, rho_ratio );

See also

ATMOS_TYPE

Parameters

[in]	alt	Altitude
[in]	delta_temp	Deviation in temperature from the value specified in the atmospheric model
[in]	atmos_type	Atmospheric model enum (i.e. ATMOS_TYPE_HERRINGTON_1966)
[out]	temp	output Temperature
[out]	pres	output Pressure
[out]	pres_ratio	Ouput pressure ratio
[out]	rho_ratio	Output density ratio

DeleteExcrescence()

void DeleteExcrescence

(

const int &in

excresName

)

Delete an Excresence from the Parasite Drag Tool

AddExcrescence( "Miscellaneous", EXCRESCENCE_COUNT, 8.5 );
 
AddExcrescence( "Cowl Boattail", EXCRESCENCE_CD, 0.0003 );
 
AddExcrescence( "Percentage Example", EXCRESCENCE_PERCENT_GEOM, 5 );
 
DeleteExcrescence( 2 ); // Last Index

Parameters

[in]

excresName

Name of the Excressence

UpdateParasiteDrag()

void UpdateParasiteDrag

(

)

Update any refernce geometry, atmospheric properties, excressences, etc. in the Parasite Drag Tool

WriteAtmosphereCSVFile()

void WriteAtmosphereCSVFile	(	const string &in	file_name,
		const int &in	atmos_type
	)

Calculate the atmospheric properties determined by a specified model for a preset array of altitudes ranging from 0 to 90000 m and write the results to a CSV output file

Print( "Starting USAF Atmosphere 1966 Table Creation. \n" );
 
WriteAtmosphereCSVFile( "USAFAtmosphere1966Data.csv", ATMOS_TYPE_HERRINGTON_1966 );

See also

ATMOS_TYPE

Parameters

[in]	file_name	Output CSV file
[in]	atmos_type	Atmospheric model enum (i.e. ATMOS_TYPE_HERRINGTON_1966)

WriteBodyFFCSVFile()

void WriteBodyFFCSVFile

(

const string &in

file_name

)

Calculate the form factor from each body FF equation (i.e. Hoerner Streamlined Body) and write the results to a CSV output file

Print( "Starting Body Form Factor Data Creation. \n" );
WriteBodyFFCSVFile( "BodyFormFactorData.csv" );

Parameters

[in]

file_name

Output CSV file

WriteCfEqnCSVFile()

void WriteCfEqnCSVFile

(

const string &in

file_name

)

Calculate the coefficient of friction from each Cf equation (i.e. Power Law Blasius) and write the results to a CSV output file

Print( "Starting Turbulent Friciton Coefficient Data Creation. \n" );
WriteCfEqnCSVFile( "FrictionCoefficientData.csv" );

Parameters

[in]

file_name

Output CSV file

WritePartialCfMethodCSVFile()

void WritePartialCfMethodCSVFile

(

const string &in

file_name

)

Calculate the partial coefficient of friction and write the results to a CSV output file \code{.cpp} Print( "Starting Partial Friction Method Data Creation. \n" ); WritePartialCfMethodCSVFile( "PartialFrictionMethodData.csv" );

Parameters

[in]

file_name

Output CSV file

WriteWingFFCSVFile()

void WriteWingFFCSVFile

(

const string &in

file_name

)

Calculate the form factor from each wing FF equation (i.e. Schemensky 4 Series Airfoil) and write the results to a CSV output file

Print( "Starting Wing Form Factor Data Creation. \n" );
WriteWingFFCSVFile( "WingFormFactorData.csv" );

Parameters

[in]

file_name

Output CSV file