A Basic Study on Aerodynamic Noise Reduction Techniques for a Pantograph Head Using Plasma Actuators

Mitsumoji, Takeshi; Sato, Yuichi; Ikeda, Mitsuru; Sueki, Takeshi; Fukagata, Koji

doi:10.2219/rtriqr.55.184

Cited by 14 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3) [3]. In addition, basic research is also being conducted on new measures [4,5,6] using flow field control technologies, such as synthetic jet actuators, plasma actuators, etc. (Fig.…”

Section: Shinkansen Noisementioning

confidence: 99%

Recent Studies on Wayside Environmental Problems

Nagakura¹

2017

QR of RTRI

View full text Add to dashboard Cite

“…3) [3]. In addition, basic research is also being conducted on new measures [4,5,6] using flow field control technologies, such as synthetic jet actuators, plasma actuators, etc. (Fig.…”

Section: Shinkansen Noisementioning

confidence: 99%

Recent Studies on Wayside Environmental Problems

Nagakura¹

2017

QR of RTRI

View full text Add to dashboard Cite

“…(4) These equations are solved by the finite volume method with time-marching. Here, e, p and n indicate the electron, positive ion and negative ion, respectively.…”

Section: Simulation Modelmentioning

confidence: 99%

“…The conventional DBDPA has thin and simple structure and lightweight so is an easy installable device. Because of these notable merits, many application studies have been conducted; the noise-reduction of vehicles 4 , the improvement of the stall characteristics of the airfoil 5,6 Aiming to enhance the flow of DBDPA, actuators with more than two electrodes are suggested. For example, Benard et al have suggested arrayed-type DBDPAs in which multiple DBDPAs are arranged in the mainstream direction and so on.…”

Section: Introductionmentioning

confidence: 99%

Basic Study on the Voltage Characteristic of Dual-Grounded Tri-Electrode Plasma Actuator by Plasma Simulation

Nakano

Nishida

2016

47th AIAA Plasmadynamics and Lasers Conference

View full text Add to dashboard Cite

Recently, dielectric barrier discharge plasma actuator (DBDPA) is actively researched as an active flow control devices. However, the induced flow is too slow to be installed on the aerodynamic bodies to control a high-speed flow. To this problem, DualGrounded Tri-Electrode plasma actuator (DGTEPA) was suggested as a solution which can make stronger flow with better efficiency. So in this research, we investigate the discharge structure and body force field of the conventional DBDPA and the DGTEPA by a plasma simulation to clarify the mechanism that the DGTEPA gains its performance. First, we evaluated the validity of the simulation results. Although there are some quantitative and qualitative discrepancies, we confirmed they are almost qualitatively in agreement with the experiments. Second, we discussed about the distribution of the plasma density and confirmed that there is another discharge occurs near the third electrode of the DGTEPA. In addition, when the third electrode is close enough to the AC electrode edge, the plasma near the third electrode is supplied to the near region of the AC electrode edge. Last of all, we examined the body force distribution and we found there are strong body force regions in where the high density plasma exists. Also when the third electrode is close enough to the AC electrode edge, the body force is drastically enhanced because of the expansion of a discharge region near the AC electrode edge. NomenclatureD e , D p , D n e = elementary charge = diffusion coefficient for electron, positive ion and negative ion E f = body force vector = electric field vector j e , j p , j n r = electron, positive ion and negative ion number density ep r = recombination coefficient between electron and positive ion pn t = time = recombination coefficient between positive ion and negative ion p = ambient pressure v e α = ionization coefficient = mean velocity of electron ε 0 , ε r γ = secondary electron emission coefficient = electric permittivity in the vacuum and relative electric permittivity of the dielectric μe, μp, μn = time index during navigation η = attachment coefficient σ = surface charge density 1 Student of Master Course, 2-24-16, Nakacho, Koganei, Tokyo, 184-8588, JAPAN, Mechanical System Engineering, Student Member AIAA.

show abstract

“…It was also found that, by driving speakers adjoining one another in an opposite phase rather than in a coordinate phase, the speaker driving noise could be reduced while aeolian sound was also kept to a minimum. [7] In addition to the SJA solution described above to reduce aerodynamic noise through flow field control, plasma actuators (PAs) were subjected to wind tunnel tests and CFD analyses for noise reduction effect. Wind tunnel tests in the low velocity range found that flow separation could be reduced by PAs, weakening Karman vortices down the stream.…”

Section: Noise Mitigation Measuresmentioning

confidence: 99%

“…Subsequent CFD analyses found that, with enough output power available, PAs should be effective in controlling the flow field around the head, thus reducing aerodynamic noise. [8] Following the PA and SJA trials described above, a steady suction technique was investigated for a possible third solution to reduce aerodynamic noise from the pantograph head through flow field control. Using this technique, attempts were made to reproduce the PA's flow field control in the high velocity range.…”

Section: Noise Mitigation Measuresmentioning

confidence: 99%

Recent Trends in Research and Development on Environmental Engineering

Iida¹

2016

QR of RTRI

View full text Add to dashboard Cite

A Basic Study on Aerodynamic Noise Reduction Techniques for a Pantograph Head Using Plasma Actuators

Cited by 14 publications

References 9 publications

<b>Recent Studies on Wayside Environmental Problems</b>

<b>Recent Studies on Wayside Environmental Problems</b>

Basic Study on the Voltage Characteristic of Dual-Grounded Tri-Electrode Plasma Actuator by Plasma Simulation

<b>Recent Trends in Research and Development on Environmental Engineering</b>

Contact Info

Product

Resources

About