Tyrinov A. Transfer processes dynamics of oscillating jet streams at conditions of heat transfer and break-up

Object of research. Pulsing liquid jet streams. The purpose of work is complex investigation of heat and mass transfer and fluid flow in pulsing jet streams at various regimes of pulsing flow. Methods of investigation. For the solving specified problems numerical modeling and experimental researches of jet streams were used. Scientific novelty: 1. The modified homogeneous mathematical model of fluid flow and mass transfer for two phase laminar liquid jet in gas is suggested. 2. On a basis renormalization group approach the model of turbulence, which takes into account a ultra-violet range of a turbulent power spectrum, is developed at first. The model allows to calculate phenomena with negative turbulent viscosity. Practical value of work: suggested homogeneous model of fluid flow and mass transfer of two phase laminar liquid jet allows modeling Newtonian liquids dispersion processes. The obtained experimental and numerical results have allowed to construct the regime diagram of the forced jet break-up in the investigated range of Strouhal numbers 0,021...0,21. The turbulent heat and mass transfer model allows to study features of technological processes which are based on impact turbulent jets. Results of dissertational work have been used at the enterprises " НВП Случь" (Kiev), and in СКТБ с ОП ІФН НАНУ (Kiev).