A compact pneumatic pulse-jet pump with a Venturi-like reverse flow diverter,which consists of a nozzle and diffuser,is designed for lifting and transporting a hazardous fluid through a narrow mounting hole.The pumpin...A compact pneumatic pulse-jet pump with a Venturi-like reverse flow diverter,which consists of a nozzle and diffuser,is designed for lifting and transporting a hazardous fluid through a narrow mounting hole.The pumping performance for a liquid mixture or a liquid-solid mixture is examined in terms of the effects of liquid viscosity,particle mass concentration,lifting height,and compression pressure.Results reveal that the pumping performance of the compact pneumatic pulse-jet pump is controlled by jet inertia and the flow resistance of the riser tube positioned after the diffuser.The capacity of the compact pneumatic pulse-jet pump increases with compression pressure and decreases with liquid viscosity.However,even for a liquid mixture with a high viscosity of 7.38 mPa·s,a pumping capacity of 170.7 L·h-1 was observed.For a liquid mixture,two dimensionless indices of performance were found to be the ratio of Euler numbers Euout/EuDV and the suction factor q.As the liquid-solid mixture was lifted to elevation of 6.74 m by the compact pump,the particle size distributions of the liquid-solid mixture in the tank and from the riser tube outlet were determined by a particle size analyzer and found to coincide well.展开更多
Fibich＇s opera Hedy （premiered in 1896） was received as a succesfull work, although many reviewers did not know how to call the prevailing style （mixture ofwagnerianism, Grand opera, verismo exotico, the second Do...Fibich＇s opera Hedy （premiered in 1896） was received as a succesfull work, although many reviewers did not know how to call the prevailing style （mixture ofwagnerianism, Grand opera, verismo exotico, the second Don Giovanni composed for Prague because of reminiscences on Mozart＇s dramma giocoso）. It is not uneasy to find clear musical hints on Puccini in Fibich＇s next opera Sarka （premiered 1897）, but it was already in Hedy where drastic and geographically clearly determined subject was mixed with Wagnerian gesture of love extasy, which is everywhere and endless. Obviously, Fibich, as a mature artist, was able to connect rules of both Czech declamation and contemporary veristic fashion. This study tries to identify main stylistic features which shaped Fibich＇s fifth opera, and analyses receptive expectations from the side of Czech audience and its influence on Fibich＇s opera composition.展开更多
文摘A compact pneumatic pulse-jet pump with a Venturi-like reverse flow diverter,which consists of a nozzle and diffuser,is designed for lifting and transporting a hazardous fluid through a narrow mounting hole.The pumping performance for a liquid mixture or a liquid-solid mixture is examined in terms of the effects of liquid viscosity,particle mass concentration,lifting height,and compression pressure.Results reveal that the pumping performance of the compact pneumatic pulse-jet pump is controlled by jet inertia and the flow resistance of the riser tube positioned after the diffuser.The capacity of the compact pneumatic pulse-jet pump increases with compression pressure and decreases with liquid viscosity.However,even for a liquid mixture with a high viscosity of 7.38 mPa·s,a pumping capacity of 170.7 L·h-1 was observed.For a liquid mixture,two dimensionless indices of performance were found to be the ratio of Euler numbers Euout/EuDV and the suction factor q.As the liquid-solid mixture was lifted to elevation of 6.74 m by the compact pump,the particle size distributions of the liquid-solid mixture in the tank and from the riser tube outlet were determined by a particle size analyzer and found to coincide well.
文摘Fibich＇s opera Hedy （premiered in 1896） was received as a succesfull work, although many reviewers did not know how to call the prevailing style （mixture ofwagnerianism, Grand opera, verismo exotico, the second Don Giovanni composed for Prague because of reminiscences on Mozart＇s dramma giocoso）. It is not uneasy to find clear musical hints on Puccini in Fibich＇s next opera Sarka （premiered 1897）, but it was already in Hedy where drastic and geographically clearly determined subject was mixed with Wagnerian gesture of love extasy, which is everywhere and endless. Obviously, Fibich, as a mature artist, was able to connect rules of both Czech declamation and contemporary veristic fashion. This study tries to identify main stylistic features which shaped Fibich＇s fifth opera, and analyses receptive expectations from the side of Czech audience and its influence on Fibich＇s opera composition.
