Rafael Advanced Defense Systems Ltd.

Savely Khosid

Amichay H Gross

Arie Peretz

Yakov Bronfeld

Amiran Leitner

A combined fan-compressor impeller comprises a single hub and a plurality of spaced main blades extending outwardly from the hub such that an air passage channel is defined between two of the main blades. Each of the main blades is a mixed flow blade which continuously extends from a fan section at an inlet end of a channel to a compressor section at an outlet end of the channel without any axial clearance between the fan section and the compressor section, providing aerodynamic matching of pressurized air flowing through the channel from the fan section to the compressor section.

Impeller

A method, a system, and a product for enhancing the start of a turbine engine by providing a replaceable ignition module including a solid combustible substance, that when ignited, or a solid oxidizer substance, that when heated, releases hot gases rich in oxidizing species. The module includes a solid substance(s) appropriately selected as: a solid-propellant grain (SPG) and a solid oxidizer (SO); or an oxygen-rich burning substance (OBSS); or a solid-propellant grain and an oxygen-rich burning substance; or an oxygen-rich burning solid substance and a solid oxidizer. The replaceable module further contains an initiator for the initiation of the solid combustible substance, or solid-propellant grain by an initiation command (IC). The hot gases released by the ignition module start and enhance the combustion process of the air-and-fuel mixture by successive fuel heating and vaporization, followed by ignition.

Method and system for enhancing start of a turbine engine, and ignition module

At least one solid mass of oxidizing-species-releasing material (ORM), selected as a solid oxidizer (SO), and/or as oxidizing-species-releasing burning substance (ORBS) is used as a device for enhancing the starting process of a turbine engine under various ambient conditions. The ORM is introduced into the combustion chamber of the turbine engine and the starting process of the turbine engine is initiated, by help of the igniter and in association with the ORM to enhance the starting process. In operation, an ORM selected as an SO releases gaseous oxygen when heated to decompose, while an ORM chosen as an ORBS discharges oxidizing species when ignited to burn. An ORM such as an SO or an ORBS may operate alone or in various combinations of both. The ORM is configured to release a predetermined mass flow rate of oxidizing species or of gaseous oxygen.

Growing community of inventors

Haifa, Israel

Savely Khosid