This paper presents the experience of Hydroaerodynamics and hydraulic machinery department Technical university Sofia (Bulgaria) in research design cross flow water turbines. The methods computer programs used for synthesis elements part turbines are described. Results numerical experimental (model field) studies this type presented. peculiarities designed analyzed specific examples their small...

I propose to consider the question, "Can machines think?" This should begin with definitions of the meaning of the terms "machine" and "think." The definitions might be framed so as to reflect so far as possible the normal use of the words, but this attitude is dangerous, If the meaning of the words "machine" and "think" are to be found by examining how they are commonly used it is difficult to...

Electro-hydraulic proportional valve is the core control in many hydraulic systems used agricultural and engineering machinery. To address problem related to large throttling losses poor stability typically associated with these valves, here, beneficial effects of a triangular groove structure on response are studied. A mathematical model pressure compensation system based power-bond graph meth...

Pressure pulsation, created by the operation of hydraulic pumps in a fluid power system, is one of the primary causes of noise issues from hydraulic machinery. The wave energy resulting from such pulsation propagates in both the wall and the fluid of the flow pipes associated with the fluid power systems, inducing fluid borne vibration of the pipes and the consequent noise radiated from the pip...