Open AccessTHE METHOD OF GAS-DYNAMIC CALCULATION OF NITROGEN CRYOSURGICAL APPARATUS
Author(s) -
Anwar Ali Vesam
Publication year - 2015
Publication title -
problemy zdorovʹâ i èkologii
Language(s) - English
Resource type - Journals
eISSN - 2708-6011
pISSN - 2220-0967
DOI - 10.51523/2708-6011.2015-12-4-20
Subject(s) - nitrogen , liquid nitrogen , container (type theory) , materials science , liquid phase , nitrogen gas , gas phase , phase (matter) , mechanics , nuclear engineering , chemistry , thermodynamics , engineering , composite material , physics , organic chemistry
The article considers the typical scheme of a nitrogen cryosurgical apparatus and describes the apparatus units such as the container with liquid nitrogen, capillaries to supply liquid and discard vapor phase of nitrogen, cryoprobe and operational tips. Methodologies for calculating hydraulic losses along the capillaries, local hydrodynamic resistances and level differences of the liquid phase of nitrogen in the container and cryoprobe have been reported. The maximum and minimum values of nitrogen pressure in the container have been calculated.