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I would like to trouble you all to help write an answer. Thank you very much. I would like to ask, how do you insert a picture into this? Why can't I do it? 1 When the fluid flows in the pipe, if you want to measure the velocity distribution of the fluid on the cross-section of the pipe, you should use a () flowmeter to measure A Orifice plate B Venturi tube C Rotor D Speed tube 2. When the liquid flows in the pipe between two sections, its flow direction is () A flows from the section with large potential energy to the section with small potential energy B flows from the section with large static pressure energy to the section with small static pressure energy C Flow from the section with large kinetic energy to the section with small kinetic energy D. Flow from the section with large total mechanical energy to the section with small total mechanical energy
I choose DB. I don’t know if it’s right. I’ve learned it before and almost forgotten it. I just rely on my memory.
DB personal opinion, please ask experts for guidance.
DA, I think, I haven’t heard much about static pressure energy.
If it is bit energy, water and wine cannot flow from downstairs to upstairs. Personally, I think it is DB.
Personally, I think it should be D, D (1) The three measurement methods A, B, and C all get the average flow velocity.； (2) It seems that Bernoulli’s equation is obtained from the conservation of mechanical energy!
D (AB is used to measure the average flow velocity, C is measured vertically) B (Basic concept)
This post was last edited by wdyzy on 2009-9-8 22:02 Oh, 2 must be D, Bernoulli’s equation, from a place with a large (speed) + (pressure) to a small place
There is no doubt that D is the first question, but my personal feeling is A for the second question.
1. Only D is the average speed measured at the measuring point. 2. If you choose A, is there no flow in the horizontal pipe? ! C is definitely wrong. D Mechanical energy includes kinetic energy and potential energy. The direction in which it flows has nothing to do with kinetic energy.