4results about How to "Improve thrust performance" patented technology

This invention discloses a hydrogen-ammonia fuel injector with a swirling structure. The injector includes a fuel injector housing, an ammonia inlet assembly, an electronic control assembly, a valve assembly, an air intake assembly, and an injection assembly. The injection assembly includes an injector housing, a hydrogen-ammonia interface, a fixed sleeve, a flow pipe, a sliding sleeve, a fixing block, a return spring, and a return assembly. Swirling vanes are installed inside the flow pipe, forcing liquid ammonia and hydrogen into a high-speed swirling state. Centrifugal force and shear force are used to achieve uniform mixing of the two phases, forming a homogeneous hydrogen-ammonia fuel mixture. Combined with the hyperboloidal outlet channel at the bottom of the flow pipe, the injection flow pattern is organized, achieving an integrated function of "hydrogen premixing - forced swirling mixing - injection flow pattern organization." This fundamentally solves the combustion instability problem caused by uneven mixing, significantly improves the uniformity of the hydrogen-ammonia fuel mixture, and, combined with the flow pattern organization effect of the hyperboloidal outlet, effectively improves combustion stability and fuel utilization, reducing NOx emissions and ammonia slip.

The invention discloses a valveless pulsating jet engine with an oval air inlet channel. The valveless pulsating jet engine is composed of a combustion chamber, the air inlet channel, a tail pipe, an oil nozzle and the like. An engine air inlet channel is of an oval flow channel structure, the air inlet channel and a tail pipe are arranged on the rear wall face of a combustion chamber, an oil nozzle is arranged on the rear half portion of the combustion chamber, and a nozzle directly faces an air inlet. The air inlet channel has the advantages that under the constraint of the limited engine section size, a circular flow channel is changed into an oval flow channel by changing the structural form of the air inlet channel, the air inlet amount of an engine is effectively increased, and therefore the thrust of the engine is improved.

The invention discloses a liquid ammonia and aviation kerosene dual-fuel hybrid turbofan engine combined with a fuel cell for power generation, which belongs to the technical field of aero-engines and comprises a traditional turbofan core machine, a liquid ammonia fuel subsystem, an aviation kerosene fuel subsystem and a fuel cell power supply subsystem, and the liquid ammonia fuel subsystem, the aviation kerosene fuel subsystem and the fuel cell power supply subsystem are integrated. Liquid ammonia is conveyed to the liquid ammonia preheater through the fuel pump, absorbs heat of air from an outlet of the low-pressure compressor and is vaporized, and cooling of air at an inlet of the high-pressure compressor is achieved; vaporized ammonia gas enters an ammonia gas decomposition hydrogen production device which annularly sleeves the outer wall of the exhaust nozzle, and is catalytically decomposed into hydrogen gas by utilizing waste heat of the exhaust nozzle; high-temperature mixed gas generated by decomposition enters an aviation fuel preheater for preheating aviation fuel and then is conveyed to an anode of the proton exchange membrane fuel cell; and meanwhile, part of the air cooled by the liquid ammonia preheater is conveyed to the cathode of the fuel cell through a pressure reducing valve. The thrust loss caused by extracting power from the main shaft of the engine is avoided, and the energy comprehensive utilization efficiency of the whole engine is remarkably improved.

This utility model discloses a metering concentric screw valve, including a housing containing a motor; a valve body, with a rotor located at the axial center of the valve body at the output end of the motor. A coupling connects the rotor to the output end of the motor, transmitting the torque generated by the motor output to drive the rotor to rotate. The rotor consists of an integral rod body and rod head, with a double-threaded portion formed on the surface of the rod body. In this utility model, increasing the length of the rotor effectively adjusts the internal spatial layout of the cavity, allowing for smoother flow of adhesive within the cavity and a more uniform pressure distribution, thereby reducing the internal pressure and decreasing the possibility of adhesive leakage due to pressure. Furthermore, the rotor's thread structure is optimized and upgraded, changing the original single-layer thread structure to a double-layer thread structure, which provides a stronger force during rotor rotation.