离心喷嘴偏心和凸凹对双旋流器空气雾化特性的影响

为深入了解离心喷嘴偏心和凸凹2种错位形式对反向双旋流空气雾化喷嘴雾化特性的影响,采用高清照相机和相位多普勒粒子分析仪(PDPA),对不同错位程度的双旋流空气雾化喷嘴的雾场形态、索太尔平均直径、罗辛-拉姆勒(Rosin-Ramumber)分布进行试验研究。试验结果表明,喷嘴偏心将导致雾场偏移并且不对称,破坏回流区,同时液雾索太尔平均直径变大,分布指数变小,喷嘴内凹对雾场形态和液雾索太尔平均直径影响很小,但使分布指数减小;喷嘴外凸对雾场形态影响很小,但使液雾索太尔平均直径和分布指数显著增大。     

Life support system with autonomous control employing plant photosynthesis

This research was aimed at obtaining a closed control system. This was achieved by placing all the technological processes providing for human vital activities within the hermetically sealed space, and by transferring the entire control and guidance of these processes to people inhabiting the system. In contrast to existing biological life support systems, man has been included not only as a participant of metabolism, but as an operator who is the central figure in collecting information, making decisions and controlling all technological processes. To tackle this problem, the "BIOS-3" experimental complex was created for performing long-term experiments using different structures of biological life-support system. The experiment lasted six months and consisted of three stages. During the first stage the system was comprised of two equivalent phytotrons with the culture of wheat and an assortment of vegetable plants, and the living compartment. At the second stage, one of the phytotrons was removed while a compartment of chlorella cultivators was introduced. The third stage differed from the second, the former using wheat phytotron and the latter employing phytotron with an assortment of vegetable cultures. Three men inhabited the system simultaneously. The experiment demonstrated that a biological life support system controlled autonomously from the inside is feasible within a small confined space. However, immunological and microbiological research shows, that the medium created by the system is not fully adequate for man. In conclusion, some prospects have been outlined for further studies of biological life support systems.