Chinese Engine Development

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dropout003

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Through research and development, the domestically produced 300MW F-class heavy-duty gas turbine blade master alloy (UGTC47) material and purified smelting technology have been developed, forming a casting high-temperature alloy with completely independent intellectual property rights that is suitable for the long life requirements of gas turbines, which is at the same level as similar foreign technologies.
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Alfa_Particle

Alfa_Particle

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Shenyang Aeroengine Research Institute released some interesting stuff back in July.

Patents for a 2D TVC system (please WS-19 please WS-19):
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A type of engine core with core exhaust temperatures of around 1700°K (not to be confused with inlet temperature):
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A new type of exhaust nozzle seemingly for an adaptive cycle engine:
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by78

by78

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on the corrosion resistance of compressor chemically passivated blades made of GH2150A/+ alloy for a shipborne aircraft engine.

Abstract: The high temperature, high humidity, and high salt spray in the marine environment pose a serious corrosion risk to carrier-based aircraft engines. The compressor is the main channel through which the atmosphere flows through the engine, and its blades are directly eroded and corroded by the high pressure, high speed, and humid marine atmosphere, resulting in particularly prominent damage and failure. According to the service conditions of high-pressure compressor blades in a certain type of carrier-based aircraft engine, 192 hours of acid salt spray testing, 680 hours of acid atmospheric corrosion testing, and 100 hours of 600 °C salt coating hot corrosion testing were conducted on high-pressure compressor blades in GH2150A and GH2150A+ chemical passivation states. The results indicate that both types of leaves exhibited good salt spray resistance and acidic atmospheric corrosion performance. However, after 20 hours of salt-hot corrosion testing, both types of blades showed red corrosion spots, and after 60 hours of testing, the entire blade was corroded. Among them, the chemically passivated blade had less loss of quality after 100 hours of salt-hot corrosion testing compared to the original blade, indicating that chemical passivation could hinder corrosion to a certain extent, but its protective ability was limited.
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by78

by78

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from the 606th Institute on a 2D TVC nozzle design, which was verified on an unnamed engine.

Abstract: Vector propulsion and infrared stealth capability are particularly important in modern air combat, which is closely related to the aero-engine tail nozzle. According to the specific working conditions of the two-dimensional vectoring nozzle, the control system is studied in this paper and the design scheme of dual loop and dual redundancy of nozzle A8 control and vector control is proposed. The nozzle A8, A9 and vector deflection are adjusted in the steady state and transient state of the aero-engine, and the vectoring nozzle is controlled to a safe position in the fault state. Through calculation, simulation and whole aero-engine test verification, the design scheme is reasonable and feasible, and meets the requirements of the aero-engine.
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Full paper posted below in images, which are in quotes to save screen real estate.

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