The application discloses a narrow rectangular channel boiling
critical test section under motion condition with local
heat flow concentration, which adopts
direct current power single-side
electric heating and comprises a compression
glass window, compression bolts, an outer
glass window, an inner
glass window, a rectangular narrow slit flow channel, a heating plate
assembly, upper and lower pressure bearing shells, a flow
channel inlet, a flow channel outlet, an inlet
electrode assembly and an outlet
electrode assembly. The test section changes the regional resistance by adjusting the thickness of the heating plate part area, thereby changing the regional distribution
voltage and power, and realizes the
heat flow local
concentration effect. The compression glass assembly, the outer window, the air gap and the inner window jointly form a visual window for observing the experimental phenomena. The test device can complete the
visual test of the rectangular narrow slit channel boiling critical under the condition of the middle-low pressure
heat flow local concentration.