com.github.jbgust.jsrm.application.motor.grain

Class HollowCylinderGrain

java.lang.Object

com.github.jbgust.jsrm.application.motor.grain.HollowCylinderGrain

All Implemented Interfaces:

GrainConfigutation

public class HollowCylinderGrain
extends Object
implements GrainConfigutation

Constructor Summary

Constructors

Constructor and Description
HollowCylinderGrain(double outerDiameter, double coreDiameter, double segmentLength, int numberOfSegment, GrainSurface outerSurface, GrainSurface endsSurface, GrainSurface coreSurface) Create an Hollow cylindrical propellant grain

Method Summary

Modifier and Type	Method and Description
void	checkConfiguration(SolidRocketMotor solidRocketMotor)
double	getBurningArea(double burnProgression) Compute the burning area during burn
double	getGrainEndSurface(double burnProgression) Compute the end grain surface during burn
double	getGrainVolume(double burnProgression) Compute the grain volume during burn
double	getXincp(int numberOfPoints) This method should return the length that will be remove in each computation iteration ex : for hollow cylinder grain this will be : initial web thickness / numberOfPoints

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HollowCylinderGrain

public HollowCylinderGrain(double outerDiameter,
                           double coreDiameter,
                           double segmentLength,
                           int numberOfSegment,
                           GrainSurface outerSurface,
                           GrainSurface endsSurface,
                           GrainSurface coreSurface)

Create an Hollow cylindrical propellant grain

Parameters:

outerDiameter - outer grain diameter in millimeter

coreDiameter - core grain diameter in millimeter

segmentLength - the length of a segment gran in millimeter. Example : if using 4 grains of 34mm each, segmentLength is 34.

numberOfSegment - the number of segment

outerSurface - outer surface is exposed to combustion or inhibited

endsSurface - end segments surface are exposed to combustion or inhibited

coreSurface - core surface is exposed to combustion or inhibited

Method Detail

getGrainEndSurface

public double getGrainEndSurface(double burnProgression)

Description copied from interface: GrainConfigutation

Compute the end grain surface during burn

Specified by:

getGrainEndSurface in interface GrainConfigutation

Parameters:

burnProgression - (0 to 1, 0 = before burn start ; 1 = grain completly burn)

Returns:

the end grain surface in mm^2

getGrainVolume

public double getGrainVolume(double burnProgression)

Description copied from interface: GrainConfigutation

Compute the grain volume during burn

Specified by:

getGrainVolume in interface GrainConfigutation

Parameters:

burnProgression - (0 to 1, 0 = before burn start ; 1 = grain completly burn)

Returns:

the grain volume in mm^3

getBurningArea

public double getBurningArea(double burnProgression)

Description copied from interface: GrainConfigutation

Compute the burning area during burn

Specified by:

getBurningArea in interface GrainConfigutation

Parameters:

burnProgression - (0 to 1, 0 = before burn start ; 1 = grain completly burn)

Returns:

the burning area mm^2

getXincp

public double getXincp(int numberOfPoints)

Description copied from interface: GrainConfigutation

This method should return the length that will be remove in each computation iteration ex : for hollow cylinder grain this will be : initial web thickness / numberOfPoints

Specified by:

getXincp in interface GrainConfigutation

Parameters:

numberOfPoints - the number of iteration during the computation

Returns:

xincp (cf. SRM_2014.xls)

checkConfiguration

public void checkConfiguration(SolidRocketMotor solidRocketMotor)
                        throws InvalidMotorDesignException

Specified by:

checkConfiguration in interface GrainConfigutation

Throws:

InvalidMotorDesignException