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<p>Surface dielectric barrier discharge (SDBD) plasma actuation technique, driven by high-voltage alternating current (AC) signals, offers high energy conversion efficiency and enables simultaneous flow control and anti-/de-icing functions, making it particularly suitable for next-generation composite and all-electric aircraft. However, the underlying thermal mixing mechanisms remain inadequately understood, primarily due to the lack of time-resolved and spatially resolved temperature measurement techniques within the ionization zone. To address this challenge, we developed a multiphysics-coupled experimental platform in a quiescent environment. A quantitative spatial thermometry method was employed based on the calibration schlieren technique, enabling non-intrusive, full-field measurement of transient thermal responses induced by AC-SDBD plasma actuation. Particle image velocimetry (PIV), hot-wire anemometry, and infrared thermography were utilized to capture the induced flow field and validate thermal data. Results show plasma-induced heat is mainly convected downstream via starting vortices and wall-attached jets. The measured spatial temperature field strongly correlates with the velocity field, demonstrating coupled aerodynamic and thermal effects. Quantitatively, spatial temperature peaks exceed surface temperature by more than 50%, with a maximum temperature rise exceeding 100&#xa0;<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(^\circ\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mo>∘</mo> </mmultiscripts> </math></EquationSource> </InlineEquation>C above the actuator. Furthermore, spectral analysis reveals that spatial temperature fluctuations maintain response frequencies above 400&#xa0;Hz, whereas surface temperature responses are limited to below 40&#xa0;Hz due to thermal inertia and boundary layer damping. These findings establish the calibration schlieren method as an effective tool for time-resolved spatial thermometry in low-speed plasma-driven flows and provide critical insights for optimizing plasma actuator design in thermal management and anti-/de-icing applications.</p>

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Unsteady spatial temperature characterization of AC-SDBD plasma actuation using a calibration schlieren technique

  • 期刊论文

  • 发表日期：

    2026年1月8日

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  • Weiwei Hui,
  • Zhipeng Chen,
  • Hongyu Gu,
  • Dongyu Zhu,
  • Xuanshi Meng

摘要

Surface dielectric barrier discharge (SDBD) plasma actuation technique, driven by high-voltage alternating current (AC) signals, offers high energy conversion efficiency and enables simultaneous flow control and anti-/de-icing functions, making it particularly suitable for next-generation composite and all-electric aircraft. However, the underlying thermal mixing mechanisms remain inadequately understood, primarily due to the lack of time-resolved and spatially resolved temperature measurement techniques within the ionization zone. To address this challenge, we developed a multiphysics-coupled experimental platform in a quiescent environment. A quantitative spatial thermometry method was employed based on the calibration schlieren technique, enabling non-intrusive, full-field measurement of transient thermal responses induced by AC-SDBD plasma actuation. Particle image velocimetry (PIV), hot-wire anemometry, and infrared thermography were utilized to capture the induced flow field and validate thermal data. Results show plasma-induced heat is mainly convected downstream via starting vortices and wall-attached jets. The measured spatial temperature field strongly correlates with the velocity field, demonstrating coupled aerodynamic and thermal effects. Quantitatively, spatial temperature peaks exceed surface temperature by more than 50%, with a maximum temperature rise exceeding 100  \(^\circ\) ∘ C above the actuator. Furthermore, spectral analysis reveals that spatial temperature fluctuations maintain response frequencies above 400 Hz, whereas surface temperature responses are limited to below 40 Hz due to thermal inertia and boundary layer damping. These findings establish the calibration schlieren method as an effective tool for time-resolved spatial thermometry in low-speed plasma-driven flows and provide critical insights for optimizing plasma actuator design in thermal management and anti-/de-icing applications.