ultrasonic transducers used for aerospace aeroengines

At present, the new-generation ultrasonic transducers are installed on the different devices quietly to detect the signals that people need. In the future applications, ultrasonic transducers will be combined with information technology and new material technologies, more intelligent and high-sensitivity ultrasonic transducers will emerge. Non-contacting wear-free detection of detecting objects will be performed by using acoustic media. The detection performance of wall mounted ultrasonic flowmeter is hardly affected by any environmental conditions, including soot and rain.

About the aerospace aeroengines,it is gas turbines for power generation, petrochemical equipment, internal combustion engines, and other high-temperature areas have poor working conditions .ultrasonic gas meter transducers are exposed to thermal stress, contacting stress, oxidation corrosion, etc. high-temperature, high-pressure environments are used in the high-temperature gas flow sensor. Due to creep breakage of the inner wall of the engine, which may cause severe aviation accidents. At present, the pre-turbine temperature of mainstream aeroengines exceeds 1700 °C and the speed is greater than 20 000 r/min. The initial gas temperature of gas turbines also reached 1 600 °C. Petrochemical equipment also suffers from higher temperatures pressures and corrosion of portable ultrasonic transducer such as carburization. 

In order to evaluate the aero-engine of high-temperature component materials, external ultrasonic flowmeter transducer is developing the new high temperature components and validating the calculation model, it is necessary to measure some parameters of its internal components such as strain, surface temperature, and heat flux. In addition, for the health management and intelligentization requirements of the engine, during the working process of the aeroengine, the internal components of heat meter ultrasonic transducers need to be monitored in the real time. Once certain components or structures reach the conditions for maintenance or scrap, they need to be repaired in time. Replace to reduce the probability of aviation. high-temperature areas of gas turbines, internal combustion engines, and petrochemical equipment as for the new components need to be developed. At the same time, some parameters are such as strain, wall temperature, heat flux, etc. it is the components or structures in high temperature areas need to be monitored. The thickness of the thin film transducers are only a few hundred nanometers to several tens of micrometers. 

It is simple to fabricate, and it is conducive for structural and perceptive integrated manufacturing. It does not interfere with the measuring structure of high temperature flowmeter transducer. It can be directly applied to the surface of components without affecting the internal environment of the equipment. To measure the surface temperature, strain, heat flux, etc. components are high temperature areas inside aero-engines, gas turbines, internal combustion engines, and petrochemical equipment. In recent years, thin-film transducers have received great attention in the developed countries. Mounted outside ultrasonic transducer has conducted a series of basic research and application verifications for aero-engine test. However, there is still some distance from the actual application of the project. There are still many technical problems to be solved.