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Heat exchange model in absorption chamber of water-direct-absorption-typed laser energy meter
- Source :
- Optics & Laser Technology. 67:65-71
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- The interaction between laser and water flow is very complicated in the absorption chamber of a high energy laser (HEL) energy meter which directly uses water as an absorbing medium. Therefore, the heat exchange model cannot be studied through traditional methods, but it is the most important factor to improve heat exchange efficiency in the absorption chamber. After the exchanges of heat and mass were deeply analyzed, experimental study and numerical fitting were brought out. The original testing data of laser power and water flow temperature at one moment were utilized to calculate those at the next moment, and then the calculated temperature curve was compared with the measured one. If the two curves matched well, the corresponding coefficient was obtained. Meanwhile, numerous experiments were performed to study the effects of laser power, duration, focal spot scale, and water flow rate on heat exchange coefficient. In addition, the relationship between water phase change and heat exchange was analyzed. The heat exchange coefficient was increased by optimizing the construction of the absorption chamber or increasing water flow rate. The results provide the reference for design of water-direct-absorption-typed HEL energy meters, as well as for analysis of the interaction between other similar lasers and water flow.
- Subjects :
- Materials science
Water flow
Thermodynamics
Mechanics
Laser
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
law.invention
Moment (mathematics)
Electricity meter
law
Heat exchanger
Laser power scaling
Electrical and Electronic Engineering
Absorption (electromagnetic radiation)
Energy (signal processing)
Subjects
Details
- ISSN :
- 00303992
- Volume :
- 67
- Database :
- OpenAIRE
- Journal :
- Optics & Laser Technology
- Accession number :
- edsair.doi...........00eda760b0147528f23570cbae18caaa