Scholarlink

<p>In the present study, a dielectric barrier discharge (DBD) plasma actuator is employed as an active vortex generator to enhance heat transfer over an inclined surface. The main aim is to investigate how plasma actuation can adjust the flow structure and improve both local and average heat transfer coefficients. A detailed numerical analysis was conducted for cases with and without the plasma actuator, examining the influence of key parameters including voltage, frequency, Reynolds number, and actuator position. The results reveal that the application of DBD plasma actuators effectively suppresses flow separation by injecting momentum into the boundary layer, leading to significant improvements in thermal performance. Under the most effective conditions (voltage of 16&#xa0;kV, frequency of 16&#xa0;kHz, inlet velocity of 3&#xa0;m/s, and actuator positioned 625&#xa0;mm from the geometry origin), the local heat transfer coefficient increased by 394%, the average heat transfer coefficient by 280%, and the maximum fluid velocity by 333% compared to conventional flow. Furthermore, increasing voltage or frequency enhances heat transfer and velocity, while optimizing the actuator location further delays flow separation, resulting in up to 48% higher maximum velocity and 20% higher average heat transfer.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Numerical study on the use of plasma actuator as a vortex generator for heat transfer augmentation over an inclined surface

  • 期刊论文

  • 发表日期：

    2026年3月30日

查看全文
  • Milad Rahimi Khosroabadi,
  • Nima Amanifard,
  • Hamed Mohaddes Deylami

摘要

In the present study, a dielectric barrier discharge (DBD) plasma actuator is employed as an active vortex generator to enhance heat transfer over an inclined surface. The main aim is to investigate how plasma actuation can adjust the flow structure and improve both local and average heat transfer coefficients. A detailed numerical analysis was conducted for cases with and without the plasma actuator, examining the influence of key parameters including voltage, frequency, Reynolds number, and actuator position. The results reveal that the application of DBD plasma actuators effectively suppresses flow separation by injecting momentum into the boundary layer, leading to significant improvements in thermal performance. Under the most effective conditions (voltage of 16 kV, frequency of 16 kHz, inlet velocity of 3 m/s, and actuator positioned 625 mm from the geometry origin), the local heat transfer coefficient increased by 394%, the average heat transfer coefficient by 280%, and the maximum fluid velocity by 333% compared to conventional flow. Furthermore, increasing voltage or frequency enhances heat transfer and velocity, while optimizing the actuator location further delays flow separation, resulting in up to 48% higher maximum velocity and 20% higher average heat transfer.