| US 7,500,348 B2 | ||
| Pulse combustion device | ||
| Kirk R. Lupkes, Renton, Wash. (US); and Gary L. Lidstone, Federal Way, Wash. (US) | ||
| Assigned to United Technologies Corporation, Hartford, Conn. (US) | ||
| Filed on Mar. 24, 2005, as Appl. No. 11/90,753. | ||
| Prior Publication US 2006/0216662 A1, Sep. 28, 2006 | ||
| Int. Cl. F02C 5/02 (2006.01) | ||
| U.S. Cl. 60—39.38 [60/39.76] | 21 Claims |
| 1. A pulse combustion device comprising:
a circular array of combustion conduits, each comprising a wall surface extending from an upstream inlet to a downstream outlet;
at least one inlet valve positioned to admit at least a first gas to the combustion conduit inlets; and
an outlet end member, the array and outlet end member rotatable in at least a first direction relative to each other, the
outlet end member forming a nozzle having a circumferentially varying geometry including: a circumferentially varying characteristic
ratio of inlet radial span to throat radial span varying along a sector corresponding to between a third of cycle and a full
cycle.
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