Measurement of boundary layer transition on oscillating airfoil using cnttsp in low-speed wind tunnel

Tsubasa Ikami, Koji Fujita, Hiroki Nagai, Daisuke Yorita

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

cntTSP is a flow visualization technique combining temperature-sensitive paint (TSP) and carbon nanotube (CNT). TSP is a sprayable temperature sensor, and CNT is used as a thin inner electric heater for TSP. The cntTSP technique allows visualizing a dynamic boundary layer transition on a moving airfoil in the low-speed condition. In this study, cntTSP was used to visualize a movement of the dynamic boundary layer transition on a pitch-oscillating airfoil in the low-speed wind tunnel. The transition position was evaluated by using a heat transfer coefficient. At a high reduced frequency, the detected transition positions were different between pitching-up and pitching-down procedure, and hysteresis was observed. Moreover, we observed not only the unsteadiness of the aerodynamic phenomenon due to the pitch-oscillation but also the thermal delay due to the response time of the cntTSP.

Original languageEnglish
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105951
DOIs
Publication statusPublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: 2020 Jan 62020 Jan 10

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF

Conference

ConferenceAIAA Scitech Forum, 2020
CountryUnited States
CityOrlando
Period20/1/620/1/10

ASJC Scopus subject areas

  • Aerospace Engineering

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