Appeal 2007-0113
Application 10/353,776
THE INVENTION
Appellants’ claimed invention is directed to “a technique of increasing
time average thrust and/or time averaged output mass flow rate using a fluid
jet of a given time averaged input mass flow rate” (Spec. 1:8-10).
Independent claim 2 is representative of the claimed invention and reads as
follows.
2. A method for producing thrust from fluid jet
pulses, comprising:
providing a jet nozzle with a primary
dimension of D to produce a stream of fluid
pulses;
controlling a formation number F and a
pulsing frequency f=1/T of the fluid pulses to
optimize the thrust,
wherein T is a pulse period T between two
adjacent pulses and the formation number F is
defined by
where m is a total mass of fluid emitted during a
single pulse in one pulse duration t which is less
than T, p is an average density of the fluid emitted
in one pulse, A is a cross-section area of the nozzle
orifice, and U is an average velocity of the fluid
relative to the nozzle during one pulse duration t.
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: September 9, 2013