This paper investigates the CO2 snow generation device in the endoscopic system for medical application, and to explore the CO2 snow freezing effect during in vitro test. A particle RT Sizer, Particle Image Velocimetry system (PIV), Thermal Video System, and a hand-made CO2 snow scale system are used in this research. Effects of formation chamber and bypass aperture on the quantity and quality of CO2 snow production are investigated. Results show that CO2 snow has a superior freezing capability in the application of cryosurgery, it is a potential star for the application of cryosurgery guided by endoscopic. Results also show that the length of formation chamber is an effective controlling parameter that has positive effects on snow quantity (size and production rate), freezing capability (freezing rate and minimum temperature) and impact area of snow ice. Furthermore, the bypass aperture has negative effects both on nucleation and agglomeration of small particles and on average size of CO2 snow outside the chamber. However, it is an effective method to resolve the problem of chamber frozen.
|Number of pages||8|
|Journal||Journal of Aeronautics, Astronautics and Aviation|
|Publication status||Published - 2012 Sep|
All Science Journal Classification (ASJC) codes
- Aerospace Engineering
- Space and Planetary Science