Experimental Study for Momentum Transfer in a Dielectric Barrier Discharge Plasma Actuator
Experimental Study for Momentum Transfer in a Dielectric Barrier Discharge Plasma Actuator
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DOI：
10.2514/1.30985
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发表时间：
2008-09
期刊：
影响因子：
2.5
通讯作者：
T. Abe;Y. Takizawa;S. Sato;Nobara Kimura
中科院分区：
文献类型：
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作者：
T. Abe;Y. Takizawa;S. Sato;Nobara Kimura
通过实验研究了环境气体压力、环境气体种类和电极结构对等离子体激励器动量传递性能的影响。对于动量传递性能的测量，由致动器施加的力，除了诱导速度，进行了测量;两种测量方法之间的一致性进行了论证。结果表明，等离子体激励器工作时的环境气压对动量传递性能有很大影响。事实上，性能不会随着环境气体压力的降低而线性降低;相反，它最初增加，然后降低。环境气体的化学种类也对动量传递性能有相当大的影响。在压力小于1个大气压时，空气中的动量传递大于氮气中的动量传递，这表明空气中的氧分子做出了相当大的贡献。在二氧化碳气体中的动量传递性能是略大于在氮气中的压力小于1个大气压，虽然他们是在1个大气压的压力相当。此外，电极配置被发现强烈影响等离子体激励器的动量传递性能。特别地，在1个大气压的环境气体压力下，与具有类似厚度的带状电极的性能相比，网状电极可以显著地改善性能。然而，归因于电极配置的性能差异随着环境气体压力的降低而大大减小;例如，在小于约50 kPa的压力下，其几乎消失。
The momentum-transfer performance of a plasma actuator was investigated experimentally for the effects of ambient-gas pressure, ambient-gas species, and electrode configuration. For measurement of the momentum-transfer performance, the force exerted by the actuator, in addition to the induced velocity, was measured; the consistency between both measurement methods was demonstrated. Results showed that the ambient-gas pressure under which a plasma actuator operates has a considerable effect on the momentum-transfer performance. In fact, the performance does not decrease in a linear manner with decreasing ambient-gas pressure; rather, it initially increases and then decreases. The chemical species of the ambient gas also has a considerable effect on the momentum-transfer performance. The momentum transfer in air is greater than that in nitrogen gas at pressures of less than 1 atm, which suggests a considerable contribution of oxygen molecules in the air. The momentum-transfer performance in carbon dioxide gas is slightly greater than that in nitrogen gas for pressures of less than 1 atm, although they are comparable at 1-atm pressure. Furthermore, the electrode configuration was found to strongly affect the momentum-transfer performance of the plasma actuator. In particular, a mesh-type electrode can improve the performance markedly, compared with the performance of a tape electrode with similar thickness, in an ambient-gas pressure of 1 atm. However, the performance difference attributable to the electrode configuration is greatly reduced with a decrease in the ambient-gas pressure; for example, it almost disappears at pressures of less than approximately 50 kPa.