Manage time in terms of engine RPM and crank-angle. More...
#include <engine/engineTime.H>
Manage time in terms of engine RPM and crank-angle.
When engineTime is in effect, the userTime is reported in degrees crank-angle instead of in seconds. The RPM to be used is specified in constant/engineGeometry. If only a time conversion is required, the geometric engine parameters can be dropped or set to zero.
For example,
rpm rpm [0 0 -1 0 0] 2000; conRodLengthconRodLength [0 1 0 0 0] 0.0; borebore [0 1 0 0 0] 0.0; stroke stroke[0 1 0 0 0] 0.0; clearance clearance [0 1 0 0 0] 0.0;
Definition at line 69 of file engineTime.H.
Inheritance diagram for engineTime: Collaboration diagram for engineTime:Public Member Functions | |
| engineTime (const word &name, const fileName &rootPath, const fileName &caseName, const fileName &systemName="system", const fileName &constantName="constant", const fileName &dictName="engineGeometry") | |
| Construct from objectRegistry arguments.
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| virtual | ~engineTime () |
| scalar | degToRad (const scalar rad) const |
| Convert degrees to radians.
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| scalar | degToTime (const scalar theta) const |
| Convert degrees to seconds (for given engine speed in RPM)
| |
| scalar | timeToDeg (const scalar t) const |
| Convert seconds to degrees (for given engine speed in RPM)
| |
| scalar | pistonPosition (const scalar theta) const |
| Calculate the piston position from the engine geometry.
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| const dictionary & | engineDict () const |
| Return the engine geometry dictionary.
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| const dimensionedScalar & | rpm () const |
| Return the engines current operating RPM.
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| const dimensionedScalar & | conRodLength () const |
| Return the engines connecting-rod length.
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| const dimensionedScalar & | bore () const |
| Return the engines bore.
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| const dimensionedScalar & | stroke () const |
| Return the engines stroke.
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| const dimensionedScalar & | clearance () const |
| Return the engines clearance-gap.
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| scalar | theta () const |
| Return current crank-angle.
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| scalar | thetaRevolution () const |
| Return current crank-angle translated to a single revolution.
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| scalar | deltaTheta () const |
| Return crank-angle increment.
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| dimensionedScalar | pistonPosition () const |
| Return current piston position.
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| dimensionedScalar | pistonDisplacement () const |
| Return piston displacement for current time step.
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| dimensionedScalar | pistonSpeed () const |
| Return piston speed for current time step.
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| virtual scalar | userTimeToTime (const scalar theta) const |
| Convert the user-time (CA deg) to real-time (s).
| |
| virtual scalar | timeToUserTime (const scalar t) const |
| Convert the real-time (s) into user-time (CA deg)
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| virtual void | readDict () |
| Read the control dictionary and set the write controls etc.
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| virtual bool | read () |
| Read the controlDict and set all the parameters.
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| engineTime | ( | const word & | name, |
| const fileName & | rootPath, | ||
| const fileName & | caseName, | ||
| const fileName & | systemName = "system",
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| const fileName & | constantName = "constant",
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||
| const fileName & | dictName = "engineGeometry"
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||
| ) |
Construct from objectRegistry arguments.
Definition at line 51 of file engineTime.C.
References dimensioned< Type >::readIfPresent().
| virtual ~engineTime | ( | ) | [inline, virtual]
|
Definition at line 115 of file engineTime.H.
| Foam::scalar degToRad | ( | const scalar | rad ) | const |
Convert degrees to radians.
Definition at line 125 of file engineTime.C.
References Foam::mathematicalConstant::pi().
| Foam::scalar degToTime | ( | const scalar | theta ) | const |
Convert degrees to seconds (for given engine speed in RPM)
Definition at line 131 of file engineTime.C.
| Foam::scalar timeToDeg | ( | const scalar | t ) | const |
Convert seconds to degrees (for given engine speed in RPM)
Definition at line 138 of file engineTime.C.
| Foam::scalar pistonPosition | ( | const scalar | theta ) | const |
Calculate the piston position from the engine geometry.
and given crank angle.
Definition at line 177 of file engineTime.C.
References Foam::cos(), Foam::sin(), Foam::sqr(), and Foam::sqrt().
| const dictionary& engineDict | ( | ) | const [inline]
|
Return the engine geometry dictionary.
Definition at line 140 of file engineTime.H.
Referenced by fvMotionSolverEngineMesh::fvMotionSolverEngineMesh(), and layeredEngineMesh::layeredEngineMesh().
| const dimensionedScalar& rpm | ( | ) | const [inline]
|
Return the engines current operating RPM.
Definition at line 146 of file engineTime.H.
| const dimensionedScalar& conRodLength | ( | ) | const [inline]
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Return the engines connecting-rod length.
Definition at line 152 of file engineTime.H.
| const dimensionedScalar& bore | ( | ) | const [inline]
|
Return the engines bore.
Definition at line 158 of file engineTime.H.
| const dimensionedScalar& stroke | ( | ) | const [inline]
|
Return the engines stroke.
Definition at line 164 of file engineTime.H.
| const dimensionedScalar& clearance | ( | ) | const [inline]
|
Return the engines clearance-gap.
Definition at line 170 of file engineTime.H.
| Foam::scalar theta | ( | ) | const |
Return current crank-angle.
Definition at line 145 of file engineTime.C.
| Foam::scalar thetaRevolution | ( | ) | const |
Return current crank-angle translated to a single revolution.
(value between -180 and 180 with 0 = top dead centre)
Definition at line 153 of file engineTime.C.
| Foam::scalar deltaTheta | ( | ) | const |
Return crank-angle increment.
Definition at line 171 of file engineTime.C.
| Foam::dimensionedScalar pistonPosition | ( | ) | const |
Return current piston position.
Definition at line 196 of file engineTime.C.
References Foam::dimLength.
| Foam::dimensionedScalar pistonDisplacement | ( | ) | const |
Return piston displacement for current time step.
Definition at line 207 of file engineTime.C.
References Foam::dimLength.
Referenced by layeredEngineMesh::move(), and fvMotionSolverEngineMesh::move().
| Foam::dimensionedScalar pistonSpeed | ( | ) | const |
Return piston speed for current time step.
Definition at line 218 of file engineTime.C.
References Foam::dimVelocity.
| Foam::scalar userTimeToTime | ( | const scalar | theta ) | const [virtual]
|
Convert the user-time (CA deg) to real-time (s).
Reimplemented from TimeState.
Definition at line 229 of file engineTime.C.
| Foam::scalar timeToUserTime | ( | const scalar | t ) | const [virtual]
|
Convert the real-time (s) into user-time (CA deg)
Reimplemented from TimeState.
Definition at line 235 of file engineTime.C.
| void readDict | ( | ) | [virtual]
|
Read the control dictionary and set the write controls etc.
Reimplemented from Time.
Definition at line 103 of file engineTime.C.
References Time::readDict().
| bool read | ( | ) | [virtual]
|
Read the controlDict and set all the parameters.
Reimplemented from Time.
Definition at line 111 of file engineTime.C.
References Time::read().
