Turboshaft gas turbine engine and expansion ratio relationship
US11486302B2 · kind B2 · utility
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6References
6Claims
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Key dates
| Filing date | Oct 1, 2020 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Oct 1, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2240/35
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A turboshaft gas turbine engine comprises, in fluid flow series, a gas-generator compressor, a combustor, a gas-generator turbine, and a free power turbine. The expansion ratios of the turbines are dependent upon an outlet temperature of the combustor, and an expansion relationship between the turbines is defined as the ratio of expansion ratios of the turbines over a running range of non-dimensional power outputs of the gas turbine engine. A second derivative of the expansion relationship is from 0.6 to 1.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.