由英国曼彻斯特大学科技学院电子和电机工程系承办、英国工业过程层析成像技术虚拟中心主办的首届世界工业过程层析成像会议(1st World Congress on Industrial ProcessTomography)于1999年4月14日至17日在英国德比郡Buxton市召开。出...由英国曼彻斯特大学科技学院电子和电机工程系承办、英国工业过程层析成像技术虚拟中心主办的首届世界工业过程层析成像会议(1st World Congress on Industrial ProcessTomography)于1999年4月14日至17日在英国德比郡Buxton市召开。出席会议的代表约140人,分别来自中、英、法、德、美、意、土、波、荷、比、西、葡、挪、芬、加、澳等18个国家,除来自高等学校的代表外,还有来自杜邦公司研究发展中心,Zencca,CEA,CMR,法国原子能研究中心,美国劳伦斯利弗摩尔国家实验室等单位的代表,以及高新科技企业ITS。展开更多
The fluid flow and oil-water separation were simulated using a Reynolds stress transport equation model of turbulence in water flow and a stochastic model of oil droplet motion. Simulation results give the axial and t...The fluid flow and oil-water separation were simulated using a Reynolds stress transport equation model of turbulence in water flow and a stochastic model of oil droplet motion. Simulation results give the axial and tangential velocity components, the pressure and turbulence intensity distribution and droplet trajectories for a hydrocyclone of F type and a hydrocyclone proposed by the present authors. The flow field predictions are in qualitative agreement with the LDV measurements. The results show that the proposed hydrocyclone has better performance than the hydrocyclone of F type due to creating stronger centrifugal force and lower axial velocity.展开更多
Solid-liquid hydrocyclones are mainly used to separate large particles, such as the particles of drilling fluid in petroleum industry, and large mineral particles. Till now the hydrocyclonic separation for fine partic...Solid-liquid hydrocyclones are mainly used to separate large particles, such as the particles of drilling fluid in petroleum industry, and large mineral particles. Till now the hydrocyclonic separation for fine particles is still a big problem. Basic separation principle of hydrocyclones and experimental research facility are simply introduced. The difficulty of separating fine particle is analyzed. Based on a solid-liquid hydrocyclone used for separating fine particles, relationships of dimensionless pressure characteristic parameters, i.e. Euler number and pressure drop ratio, with several main dimensionless parameters, such as split ratio, swirl number and gas-liquid ratio, were experimentally studied in detail. The research was carried out by using the hydrocyclonic separation experimental rig at the University of Bradford. It is shown that the less the size of particle, the less the value of radius of the balance orbit occupied by the particle, and then the more difficult for the particle to be separated. Experiments indicate that Euler number of the tested hydrocyclone increases with the rise of Reynolds number, split ratio, swirl number and gas-liquid ratio respectively, and the pressure drop ratio falls with the increase of Reynolds number, split ratio and swirl number respectively. It is concluded that the most effective way to decrease the unit energy dissipation of hydrocyclone is to reduce swirl number or gas-liquid ratio of the mixed media.展开更多
文摘由英国曼彻斯特大学科技学院电子和电机工程系承办、英国工业过程层析成像技术虚拟中心主办的首届世界工业过程层析成像会议(1st World Congress on Industrial ProcessTomography)于1999年4月14日至17日在英国德比郡Buxton市召开。出席会议的代表约140人,分别来自中、英、法、德、美、意、土、波、荷、比、西、葡、挪、芬、加、澳等18个国家,除来自高等学校的代表外,还有来自杜邦公司研究发展中心,Zencca,CEA,CMR,法国原子能研究中心,美国劳伦斯利弗摩尔国家实验室等单位的代表,以及高新科技企业ITS。
基金Supported by the Special Funds for Major State Basic Research (No. 1999-0222-08).
文摘The fluid flow and oil-water separation were simulated using a Reynolds stress transport equation model of turbulence in water flow and a stochastic model of oil droplet motion. Simulation results give the axial and tangential velocity components, the pressure and turbulence intensity distribution and droplet trajectories for a hydrocyclone of F type and a hydrocyclone proposed by the present authors. The flow field predictions are in qualitative agreement with the LDV measurements. The results show that the proposed hydrocyclone has better performance than the hydrocyclone of F type due to creating stronger centrifugal force and lower axial velocity.
文摘Solid-liquid hydrocyclones are mainly used to separate large particles, such as the particles of drilling fluid in petroleum industry, and large mineral particles. Till now the hydrocyclonic separation for fine particles is still a big problem. Basic separation principle of hydrocyclones and experimental research facility are simply introduced. The difficulty of separating fine particle is analyzed. Based on a solid-liquid hydrocyclone used for separating fine particles, relationships of dimensionless pressure characteristic parameters, i.e. Euler number and pressure drop ratio, with several main dimensionless parameters, such as split ratio, swirl number and gas-liquid ratio, were experimentally studied in detail. The research was carried out by using the hydrocyclonic separation experimental rig at the University of Bradford. It is shown that the less the size of particle, the less the value of radius of the balance orbit occupied by the particle, and then the more difficult for the particle to be separated. Experiments indicate that Euler number of the tested hydrocyclone increases with the rise of Reynolds number, split ratio, swirl number and gas-liquid ratio respectively, and the pressure drop ratio falls with the increase of Reynolds number, split ratio and swirl number respectively. It is concluded that the most effective way to decrease the unit energy dissipation of hydrocyclone is to reduce swirl number or gas-liquid ratio of the mixed media.
