History of MembersPage/MarcellGal/DetonationCycleGasTurbine
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2009-10-12 11:16:46 . . . . MembersPage/MarcellGal [detonation cycle]


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The best introduction to pulse-jets I found is from Bruno Ogorelec (Croatia) [here]

The pulse-jet can be used as a "gas-generator" for gas-turbine.

* many people have run it on propane. Propane is simplest fuel for experiments

** however, in the end we should be able to use wood-gas as fuel. See MembersPage/MarcellGal/WoodGasifierEngine

** Running on woodgas is not trivial. We need separate intake for air and woodgas, only mixing inside the detonation chamber. We need a BIG gasifier throat. Not 3" throat, maybe 10-12 inch.

** blower (not compressor: the blower pressure ratio is 1.05 .. 1.1) needed, probably all the time (not just to start the gasifier)

** if the standard measures to redirect high speed output gas-stream from the incoming gas does not work ("prohibitive blowback"), we can try Nikola Tesla's Valvular Conduit (1920 patent)

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I have sketches of a detonation chamber. We are optimizing it for

* KKK K-28 turbocharger

** can someone recommend a gas-flowrate for KKK K28 turbine (pressure ratio appr 2-2.5 ) ? Near best efficiency would be nice

** using both inputs or just the "outer output" (the closer to the exhaust) ?

** what power engines is the K28 used in ? 320-450 Hp ?

* with 6 NdBFe magnet axial-gap alternator with Ferrite stator coils

We expect to lower the (otherwise extreme) noise level of the pulse-jet in several ways

* chamber shape

* output snake with different-length runners so the pulse from the same detonation arrives to the turbine at different times.

* the turbine itself helps a LOT to reduce noise (the MembersPage/MarcellGal/PowerAndTraction has a straight-through exhaust system after a K26 turbine, still not very loud)

** we might use low pressure ratio secondary turbines (nozzle + tesla turbine) in series

* mounting in underground well

Hopefully it should be suitable for rural water-pumping, or power-plant for other usage.