Double Precision Input Parameters

The main heat release code is treated as one subroutine so it can be used in a wide number of applications. As a result, the authors have encompassed the input data (such as engine geometry) into arrays that are fed directly into the subroutine. There are two distinct arrays: one for and the other for variables. On this page you will find a description of the double precision array variables.

Array Number
Sample Value
Description
(1)
1
Crank angle resolution [deg]
(2)
0.0824
Bore [m]
(3)
0.0795
Stroke [m]
(4)
9.7
Compression ratio [-]
(5)
0.138
Connecting rod length [m]
(6)
0.006133
Cylinder head surface area []
(7)
0.00533
Piston crown surface area []
(8)
2000
Engine speed [rev/min]
(9)
0.00303
Air flow rate [kg/s/cyl] or equivalence ratio [-]
(10)
0.000207
Fuel flow rate [kg/s/cyl]
(11)
10
Mass of burned products (residual + EGR) [% of total mass]
(12)
500
Wall temperature [K]
(13)
-103
Intake valve closing [deg]
(14)
-27
Fuel injection or spark timing [deg]
(15)
300
Initial guess for gas constant [J/kg/K]
(16)
1.25
Initial guess for ratio of specific heats [-]
(17)
14.82
Stoichiometric Air/Fuel ratio
(18)
43600
Lower heating value of fuel [kJ/kg]
(19)
3.26
Heat transfer parameter 1: Hohenberg example
(20)
-0.06
Heat transfer parameter 2: Hohenberg example
(21)
0.8
Heat transfer parameter 3: Hohenberg example
(22)
-0.4
Heat transfer parameter 4: Hohenberg example
(23)
1.4
Heat transfer parameter 5: Hohenberg example
(24)
0.8
Heat transfer parameter 6: Hohenberg example
(25)
0
Heat transfer parameter 7
(26)
0
Heat transfer parameter 8
(27)
0
Heat transfer parameter 9
(28)
0
Heat transfer parameter 10
(29)
0.0001
Epsilon - the convergence criterion
(30)
101
Exhaust valve opening [deg]
(31)
0
Digital Filtering Option 1 (Low Filter), Not sure (used with FT = 9)
(32)
0
Digital Filtering Option 2 (High Filter), Not sure (used with FT = 9)
(33)
0
Digital Filtering Option 3 (Wiggles), Not sure (used with FT = 9)
(34)
0
Digital Filtering Option 4 (Nterms), Not sure (used with FT = 9)
(35)
0.21
Mole Fraction of in air
(36)
0.79
Mole Fraction of in air
(37)
0
Mole Fraction of Ar in air
(38)
0
Mole Fraction of in air
(39)
8
Fuel Carbon Moles: Isooctane example
(40)
18
Fuel Hydrogen Moles: Isooctane example
(41)
0
Fuel Oxygen Moles: Isooctane example
(42)
0
Fuel Nitrogen Moles: Isooctane example
(43)
0
Top dead center adjustment [deg]
(44)
0
Heat transfer parameter 11
(45)
0
Heat transfer parameter 12
(46)
0
Heat transfer parameter 13
(47)
0
Heat transfer parameter 14
(48)
0
Heat transfer parameter 15
(49)
0
Heat transfer parameter 16
(50)
0
Heat transfer parameter 17
(51)
0
Heat transfer parameter 18
(52)
0
Heat transfer parameter 19
(53)
0
Heat transfer parameter 20

† The sample values are for the .

Unless otherwise expressly stated, all original material of whatever nature created by Dr. Christopher D. Depcik () and included in this website and any related pages is licensed under a .
Creative Commons License
Date Created: 05/28/2003
Date Revised: 10/11/2005