GB492904A - Improvements in and relating to engine cooling systems for vehicles and aircraft - Google Patents

Abstract

492,904. Propelling aircraft &c. by waste heat from engine - cooling air; radiators. BOULET, G. March 31, 1937, No. 9119. Convention date, April 2, 1936. [Classes 4 and 114] [Also in Groups XIII and XXXI] A device for recuperating the thermic energy carried away by the cooling air of an internalcombustion engine driving a vehicle, comprises one or more stationary sets of blades through which the air flows, the blades being shaped and arranged like the blades of a low - pressure steam turbine so that the passage of the air through the blades imparts a thrust which may be utilized for propulsion or suspension. As applied to the radiator of an aircraft engine, Fig. 2, annular manifolds 1, 2 are spaced apart by flattened hollow rings 3 connected to one another and to the manifolds by hollow cross-pieces 4. The space inside the rings at one end is closed by a cover 5 and at the other end receives an air inlet pipe 6 leading to the front of the aircraft, the area, of the pipe being substantially equal to the area between the rings 3. Around the members 3 and coaxial thereto are hollow rings 4a provided with curved fins or recuperator blades 7 through which the cooling air passes and imparts a thrust. The fins may be hollow for the passage of the cooling liquid, as shown at 7<1>, Fig. 7. The blades are surrounded by a casing 8 which is extended to direct the air to a second stage 9 having recuperator blades 10 in a casing 12 which exhausts the air into a zone of low pressure. The rings 3 may be dispensed with. The cooling liquid may pass through straight flattened tubes between upper and lower manifolds, the members 7 also being arranged as extensions of the tubes. As applied to an air-cooled engine 15, Fig. 9, the circulating air is enclosed in a casing 17, 18 and the recuperator blades 19 are arranged in the discharge side of the casing. Additional blades 20 through which liquid flows and which may form recuperator blades are used in the case of a mixed air-water cooled engine. The Specification as open to inspection under Sect. 91 also describes in Fig. 10 (Cancelled), an arrangement of directing blades 21 which overlap each other in the direction of flow, these blades being arranged on a frame 22 pivoted at 23 whereby the intensity of cooling may be regulated. This subject-matter does not appear in the Specification as accepted.