git.gag.com Git - sw/motorsim/blob - src/com/billkuker/rocketry/motorsim/fuel/SaintRobertFuel.java

   1 package com.billkuker.rocketry.motorsim.fuel;\r
   2 \r
   3 import java.net.URI;\r
   4 import java.net.URISyntaxException;\r
   5 \r
   6 import javax.measure.quantity.Pressure;\r
   7 import javax.measure.quantity.Velocity;\r
   8 import javax.measure.quantity.VolumetricDensity;\r
   9 import javax.measure.unit.NonSI;\r
  10 import javax.measure.unit.Unit;\r
  11 \r
  12 import org.jscience.physics.amount.Amount;\r
  13 \r
  14 import com.billkuker.rocketry.motorsim.Fuel;\r
  15 import com.billkuker.rocketry.motorsim.RocketScience;\r
  16 \r
  17 public abstract class SaintRobertFuel implements Fuel {\r
  18         \r
  19         public enum Type{\r
  20                 SI(\r
  21                                 javax.measure.unit.SI.MILLIMETER.divide(javax.measure.unit.SI.SECOND).asType(Velocity.class),\r
  22                                 javax.measure.unit.SI.MEGA(javax.measure.unit.SI.PASCAL).asType(Pressure.class)),\r
  23                 NONSI(\r
  24                                 NonSI.INCH.divide(javax.measure.unit.SI.SECOND).asType(Velocity.class),\r
  25                                 RocketScience.PSI)\r
  26                 ;\r
  27                 \r
  28                 private final Unit<Velocity> v;\r
  29                 private final Unit<Pressure> p;\r
  30                 \r
  31                 Type( Unit<Velocity> v, Unit<Pressure> p){\r
  32                         this.p = p;\r
  33                         this.v = v;\r
  34                 }\r
  35         }\r
  36         \r
  37         private Type t = Type.SI;\r
  38         \r
  39         public SaintRobertFuel(Type t){\r
  40                 if ( t == null )\r
  41                         throw new IllegalArgumentException("Type must be non-null");\r
  42                 this.t = t;\r
  43         }\r
  44         \r
  45         public Type getType(){\r
  46                 return t;\r
  47         }\r
  48         \r
  49         protected void setType(final Type t){\r
  50                 this.t = t;\r
  51         }\r
  52 \r
  53         public Amount<Velocity> burnRate(Amount<Pressure> pressure) {\r
  54 \r
  55                 \r
  56                 double p = pressure.doubleValue(getType().p);\r
  57                 double a = burnrateCoefficient(pressure);\r
  58                 double n = burnrateExponent(pressure);\r
  59                 \r
  60                 return burnrateConstant().plus(Amount.valueOf( a*Math.pow(p,n), getType().v ));\r
  61         }\r
  62         \r
  63         protected abstract double burnrateCoefficient(Amount<Pressure> pressure);\r
  64         \r
  65         protected abstract double burnrateExponent(Amount<Pressure> pressure);\r
  66         \r
  67         protected Amount<Velocity> burnrateConstant(){\r
  68                 return Amount.valueOf(0, Velocity.UNIT);\r
  69         }\r
  70 \r
  71         public abstract Amount<VolumetricDensity> getIdealDensity();\r
  72 \r
  73         public URI getURI(){\r
  74                 try {\r
  75                         return new URI("motorsim:" + this.getClass().getSimpleName());\r
  76                 } catch (URISyntaxException e) {\r
  77                         throw new Error("Shouldn't happen", e);\r
  78                 }\r
  79         }\r
  80         \r
  81         public String getName(){\r
  82                 return this.getClass().getSimpleName();\r
  83         }\r
  84         \r
  85         public String toString(){\r
  86                 return getName();\r
  87         }\r
  88 }\r