c effective exhaust velocity, m/sec (ft/sec)

cp specific heat at constant pressure, J/kg-K (Btu/lbm-R)

cs specific heat of solid, J/kg-K (Btu/lbm-R)

cv specific heat at constant volume, J/kg-K (Btu/lbm-R)

c* characteristic velocity, m/sec (ft/sec)

CF thrust coefficient

d total derivative

e energy conversion efficiency

go standard sea level gravitational acceleration, 9.8066 m/sec2

h enthalpy per unit mass, J/kg (Btu/lbm)

Is specific impulse, sec or N-sec3/kg-m (Ibf-sec/lbm)

J mechanical equivalent of heat; J = 4.186 J/cal in SI units or 1 Btu

= 777.9 ft-lbf k specific heat ratio

m mass flow rate, kg/sec (Ibm/sec)

M mach number

931 molecular mass, kg/kg-mol (or molecular weight, lbm/lb-mol)

m, molar fraction of species i p pressure, N/m2 (Ibf /ft2 or lbf/in.2)

R gas constant per unit weight, J/kg-K (ft-lbf/lbm-R) (R = R'/ffl)

R' universal gas constant, 8314.3 J/kg mol-K (1544 ft-lb/lb mol-R)

T absolute temperature, K (R)

V specific volume, m3/kg (ft3/lbm)

w propellant weight flow rate, N/sec (lbf/sec)

Greek Letters a half angle of divergent conical nozzle section

P mass fraction of solid particles e area ratio A2/A, Â¡;d discharge correction factor t;F thrust correction factor velocity correction factor A. divergence angle correction factor for conical nozzle exit

Subscripts | |

a |
actual |

g |
gas |

i |
ideal, or a particular species in a mixture |

max |
maximum |

opt |
optimum nozzle expansion |

s |
solid |

sep |
point of separation |

t |
throat |

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What you need to know aboutâ€¦ Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.

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