Isentropic Definition and 54 Threads

  1. K

    Isentropic compression and humidity

    Trying to assess how relative humidity impacts COT, compressor outlet temperature, on a turbo charger compressor. It appears that humdity reduces gamma in the temp prediction formula, thus reducing COT. Dry air results in increased COT, and humdity reduces it. Any opinions on this?
  2. V

    How Can Isentropic Efficiency Be 90% If Entropy Remains Constant?

    Hey guys, I have been given that the isentropic efficiency of a nozzle = 90%. Inlet condictions are: 5MPa and 550°C and exit: 100kPa. Now \eta_{n}(h_{i} - h_{0}) = V^{2}_{i}/2 h(o) - h(i) is the enthalpy drop across the turbine. Now next they say that s(o) = s(i). Now how can the entropy at...
  3. H

    Shock waev? Isentropic reduction of velocity?

    Hi all. We are to compare the effect of a shock wave, that is the irreversibilities associated. We have comptued that the upstream and downstream velocities of a shock wave are 1029 m/s and 266.8 m/s respectively. The upstream pressure and temperature is 105kPa and 290K. What question...
  4. E

    Thermodynamics, isentropic and reversible processes

    Hi, I have some questions regarding thermo: 1) Does an isentropic process have to be a quasistatic one? What is the relation between equilibrium and reversibilty? 2) Naturally, there are revesible processes involving control volumes. A gas can go through an isentropic process in a reversible...
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