Review on ultrasonic bubble detection technology for liquid propellant
Liquid propellant mixed with air bubbles will have an impact on engine start-up and stable operation,which may lead to sudden engine shutdown.And it can also cause major safety incidents and economic losses.Therefore,the accurate detection of air bubbles in liquid rocket propellant delivery pipelines is of great significance.Firstly,this paper summarises the reasons for the formation and development process of bubbles in liquid rocket propellants.Further,the paper provides a detailed discussion of the principles,characteristics,and current research status of existing bubble detection methods.This paper also points out the advantages of ultrasonic detection technology in liquid propellant for pipeline bubble detection.In addition,the paper details the principles of ultrasonic Doppler,ultrasonic attenuation,and ultrasonic chromatography for bubble measurements.At last,this paper summarises the current state of research on ultrasonic bubble detection techniques and the trends for future development.Through the introduction and outlook of bubble formation and development,existing bubble detection methods,and ultrasonic bubble detection technology,this paper provides an important reference for the development of liquid rocket propellant pipeline bubble detection technology and subsequent research.