METHOD FOR EXPERIMENT IN GAS DIFFUSING WIND TUNNEL

PROBLEM TO BE SOLVED: To make it possible to measure the color changing state of a topographical model surface by dissolving color changing reagent in absorption liquids in a plurality of teat tubes set under the floor of a wind tunnel measuring unit to color changing reagent solution liquid. SOLUTION: Testing gas 8 is discharged from a stack model 2 to a wind tunnel measuring unit 4 while sending wind 1 to the measuring unit 4, dissolved in absorption liquid in respective test tubes 3 to color changing reagent solution liquid 9. Then, the mixed gas of the wind 1 and the gas 8 is sucked from respective suction tubes 6 into respective discharge tubes 10 via the liquids 9 in the respective tubes 3 by a sucking unit, and the air is exhaust out of the tubes 10. Thus, the air in the mixed gas of the unit 4 is sucked and exhausted out of the tubes 10, the gas 8 included in the mixed gas is absorbed to the absorption liquid in the respective tubes 3, the gas 8 is reacted with the liquid 9 in the absorption liquid to change the color of the absorption liquid. Since the degree of the color change is proportional to the concentration of the sucked gas 8, the testing gas concentration distribution can be quantitatively or qualitatively grasped.