本文采用有限容积法对制冷剂喷射冷却(Cryogen spray cooling,CSC)过程进行了数值分析,研究了皮肤组织温度场随时间、空间的分布规律,初步分析了喷射过程中可能发生的冷损伤.探讨了不同喷嘴距离对于喷射换热过程的影响.结果表明:本文的模拟结果定性符合文献中的试验结果;由于制冷剂喷射不均匀性带来的冷保护不足问题可以通过适当延长冷却时间(如大于80 ms)加以避免;低温制冷剂带来的冷损伤仅局限于浅表皮层,不会对人体造成伤害;喷射距离对于整个换热过程的影响非常有限,可以较为自由地布置喷嘴位置.
参考文献
[1] | J W Tunnell;J S Nelson;J H Torres et al.Epidermal Protection with Cryogen Spray Cooling During High Fluence Pulsed Dye Laser Irradiation:An Ex Vivo Study[J].Lasers Surg Meal,2000,27:373-383. |
[2] | Pikkula BM;Torres JH;Tunnell JW;Anvari B .Cryogen spray cooling: Effects of droplet size and spray density on heat removal.[J].Lasers in surgery and medicine,2001(2):103-112. |
[3] | Verkruysse W;Majaron B;Tanenbaum BS;Nelson JS .Optimal cryogen spray cooling parameters for pulsed laser treatment of port wine stains.[J].Lasers in surgery and medicine,2000(2):165-170. |
[4] | Guillermo Aguilar;Guo-Xiang Wang;J Stuart Nelson .Effect of spurt duration on the heat transfer dynamics during cryogen spray cooling[J].Physics in medicine and biology,2003(14):2169-2181. |
[5] | Franco W;Liu J;Wang GX;Nelson JS;Aguilar G .Radial and temporal variations in surface heat transfer during cryogen spray cooling[J].Physics in medicine and biology,2005(2):387-397. |
[6] | 华泽钊;任禾盛.低温生物医学技术[M].北京:科学出版社,1993 |
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