Chuanjun Han, Chuanjun Han and Yanxi Li
Keywords: Experimental device;, The Conduit;, Liquid solid coupling;, Gas solid coupling;, Erosion wear；
Abstract:
<p class="MsoNormal" style="text-align:justify;text-justify:inter-ideograph;
text-autospace:ideograph-numeric ideograph-other;vertical-align:middle"><b>Abstract</b><b>: </b>Pipes appear in a variety
of experimental devices for scientific research. The specific types of pipes
involved include 90 ° elbow, three-way pipe, four-way pipe, etc. The failure of
pipes will seriously affect the use of experimental devices, even lead to
explosion and other behaviors, resulting in life and property safety.
Therefore, it is necessary to study the pipes in the experimental devices to ensure
their safety. In this paper, the finite element analysis software is used to
study different types of pipes, which is helpful to guide the design of pipes
in the experimental device. The research results show that the wall stress of
the four-way pipe is the largest under the same internal pressure for the three
types of pipes due to the most complex structure of the four-way pipe joint, so
it is safest to take the internal pressure of the four-way pipe as the design
pressure of the pipeline in the entire test device. Under the effect of
gas-solid coupling, the erosion parts of the 90 º elbow are mainly distributed
on the outer wall of the elbow, and a rare "V" shaped erosion trace
is formed, and there is no erosion trace on the inner wall of the elbow. Under
the effect of liquid-solid coupling, both the inner and outer wall surfaces of
the 90 º elbow have been eroded, and the erosion on the inner wall surface is
more serious than that on the outer wall surface. The secondary flow of solid
particles will also cause erosion on the pipe wall surface, but it will not be
under the effect of gas-solid coupling, so liquid-solid erosion has a great
impact on the elbow. Therefore, the elbow part of the experimental device needs
to be protected under the liquid solid erosion.</p>
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