Liquid metal high-temperature oscillating heat pipe and testing method

A liquid metal high-temperature oscillating heat pipe, comprising a tee-junction liquid filling port and a stainless steel tube array integrated by an evaporator, an adiabatic section and a condenser,

• wherein two ports in a horizontal direction of the tee-junction liquid filling port are connected to two ports of the stainless steel tube array,
• a working fluid in the stainless steel tube array is a liquid form of one or more metal selected from sodium-potassium alloy, metal sodium, metal potassium, metal cesium, and metal rubidium, wherein a mass fraction of potassium in the sodium-potassium alloy ranges from 25% to 75%,
• wherein the high-temperature oscillating heat pipe is made of stainless steel, nickel base alloy, or Inconel nickel base alloy, and has a wall thickness of 0.5 mm to 3 mm, and has an inner diameter De is:
• D
• e
• <
• D
• =
• {
• 4
• ⁢
• p
• g
• ⁢
• q
• u
• ⁢
• π
• ⁢
• h
• c
• [
• Φ
• φ
• ⁢
• ρ
• L
• ,
• 0
• -
• ρ
• L
• ,
• av
• ]
• }
• 1
• 2
• ,
• wherein D represents a startup critical tube diameter of the oscillating heat pipe, having a unit of m;
• Φ represents a filling ratio, having a unit of %;
• φ represents a percentage of the working fluid to a total pipe volume after applying input power, having a unit of %;
• ρL,0 represents a density of the working fluid at an operating temperature before applying input power, having a unit of kg/m3;
• ρL,av represents an average density of the working fluid after applying input power, having a unit of kg/m3, u represents a rising speed of a bubble relative to the working fluid, having a unit of m/s;
• hc represents latent heat of vaporization of the working fluid at a cold end temperature, having a unit of J/kg;
• q represents input power, having a unit of J/s;
• and pg represents latent heat ratio, having a unit of %.