In the present work, vibration control of a simply supported plate with line type and cross type ... more In the present work, vibration control of a simply supported plate with line type and cross type piezoelectric (PZT) patches are investigated with and without actuation voltage. The plate is modeled under the assumption of Kirchhoff’s Plate theory. The mass of PZT patches remain constant in all cases. In case of actuation, applied voltage considered are 1, 2 and 3 mV. The external excitation to the plate is in the form of harmonically varying point load of 1 mN. It is noticed that cross type PZT patch is more effective in deflection suppression of plate than that of line type PZT patch at 3 mV of actuation at patch thickness of 0.75 μm. Suppression of central deflection of plate for line type and cross type PZT patches are obtained in different frequency bands of (175–185 Hz) and (870–880 Hz) respectively.
Abstract- Power generation in a nuclear plant is dependent on the Nuclear steam supply system (th... more Abstract- Power generation in a nuclear plant is dependent on the Nuclear steam supply system (thermal energy source), the turbine generator (energy conversion), the circulating water system (heat rejection) and condensate/feed water system (regenerative heat and recycle of working fluid) and the plant electric system supporting these. These power generation processes must be operated so as to maintain energy and mass balance under changing conditions of load and environment. Grid electrical disturbances cause significant deviations in grid supply voltage and frequency. The abnormal conditions that accompany the imposition of grid electrical disturbances on a nuclear plant can disrupt the dynamic state of process systems equilibrium. The impact of grid electrical disturbances are in two different ways viz. (i) process degradation and (ii) impact on electrical components. Analysis of both these aspects are required to be carried out to design efficient reactor system high plant avail...
Power generation in a nuclear plant is dependent on the Nuclear steam supply system (thermal ener... more Power generation in a nuclear plant is dependent on the Nuclear steam supply system (thermal energy source), the turbine generator (energy conversion), the circulating water system (heat rejection) and condensate/feed water system (regenerative heat and recycle of working fluid) and the plant electric system supporting these. These power generation processes must be operated so as to maintain energy and mass balance under changing conditions of load and environment. Grid electrical disturbances cause significant deviations in grid supply voltage and frequency. The abnormal conditions that accompany the imposition of grid electrical disturbances on a nuclear plant can disrupt the dynamic state of process systems equilibrium. The impact of grid electrical disturbances are in two different ways viz. (i) process degradation and (ii) impact on electrical components. Analysis of both these aspects are required to be carried out to design efficient reactor system high plant availability. I...
Content Atmospheric pressure glow discharges (APGD) based on dielectric barrier discharge (DBD) o... more Content Atmospheric pressure glow discharges (APGD) based on dielectric barrier discharge (DBD) offer the prospect of a future basic technolo8 for low-tcmperature proccssing of gaseous and solid materials without the use of a vacuum chaiuber 1}. DBD based atmospheric preveure plasma jets (APPJ’s) have wide range of potential applications such as thin film deposition |2J, sterilization |3], surface modification 4-5) , and etching |GJ . Important properties of this type of plasma are that it operates near room temperature, allows treatment of irregular surfaces and has a small penetration depth 7) . A floating helix electrode configuration 8] was implemented for generation of atmospheric pressure DBD based cold plasma jet using Ar/He gas. In this paper, floating helix electrode configuration has been used to genei-ate atmospheric pressure DBD based cold plasma jet using a mixture of argon and nitrogen gas. It was subjected to a range of supply frequencies (10-25 kHz) and supply voltag...
In this study, an atmospheric pressure dielectric barrier discharge-based argon plasma jet has be... more In this study, an atmospheric pressure dielectric barrier discharge-based argon plasma jet has been modeled using COMSOL Multiphysics, which is based on the finite element method. The fluid dynamics and plasma modules of COMSOL Multiphysics code have been used for the modeling of the plasma jet. The plasma parameters, such as electron density, electron temperature, and electrical potential, have been examined by varying the electrical parameters, that is, supply voltage and supply frequency for both cases of static and with the flow of argon gas. The argon gas flow rate was fixed at 1 l/min. Ring electrode arrangement is subjected to a range of supply frequencies (10–25 kHz) and supply voltages (3.5–6 kV). The experimental results of the ring electrode configuration have been compared with the simulation analysis results. These results help in establishing an optimized operating range of the dielectric barrier discharge-based cold plasma jet in the glow discharge regime without arci...
The European Physical Journal Applied Physics, 2018
In this paper, a dielectric barrier discharge plasma based atmospheric pressure plasma jet has be... more In this paper, a dielectric barrier discharge plasma based atmospheric pressure plasma jet has been generated in a floating helix and floating end ring electrode configuration using mixture of argon and nitrogen gases (50:50 ratio). This configuration is subjected to a range of supply frequencies (10–25 kHz) and supply voltages (6.5–9.5 kV) at a fixed rate of gas flow rate (i.e., 1 l/min). The electrical characterization of the plasma jet has been carried out using a high voltage probe and current transformer. The current–voltage characteristics have been analyzed, and the power consumed by the device has been estimated at different applied combinations of supply frequency and voltages for optimum power consumption and maximum jet length. A comparative analysis of the results of the above experiments has shown that maximum power consumed by the device in helix electrode configuration with end ring is 19 W for (Ar+N2) mixture as compared to only 12 mW and 7.7 mW for Ar and He gas res...
In this study, an atmospheric pressure cold plasma jet has been generated based on dielectric bar... more In this study, an atmospheric pressure cold plasma jet has been generated based on dielectric barrier discharge plasma. The double ring electrode configuration is used and analysis has been performed subjected to wide range of supply frequencies up to 25 kHz and supply voltage up to 6 kV. The electrical characterization of the plasma jet has been carried out using a high voltage probe. The V-I characteristics of the developed cold plasma jet have been studied and the consumption of the power has been analyzed at various input combinations of supply frequency and applied voltage. Consequently, the supply voltage and supply frequency are optimized with respect to the discharge current and jet length for optimum power consumption. The peak power consumed for glow discharge operation has been found to be 1.27 W in the optimized configuration.
In this paper, a dielectric barrier discharge plasma based atmospheric pressure plasma jet has be... more In this paper, a dielectric barrier discharge plasma based atmospheric pressure plasma jet has been generated in a floating helix and floating end ring electrode configuration using argon and helium gases. This configuration is subjected to a range of supply frequencies (10-25 kHz) and supply voltages (2-6 kV) at a fixed rate of gas flow rate (i.e., 1 l/min). The electrical characterization of the plasma jet has been carried out using a high voltage probe and current transformer. The current-voltage characteristics have been analyzed, and the consumed power has been estimated at different applied combinations for optimum power consumption at maximum jet length. The obtained optimum power and jet length for argon and helium gases are 12 mW and 32 mm, and 7.7 mW and 42 mm, respectively. It is inferred that besides the electrode configurations, the discharge gas is also playing a significant role in the low power operation of the cold plasma jet at maximum jet length. The obtained results are interpreted on the basis of penning processes.
In the present work, vibration control of a simply supported plate with line type and cross type ... more In the present work, vibration control of a simply supported plate with line type and cross type piezoelectric (PZT) patches are investigated with and without actuation voltage. The plate is modeled under the assumption of Kirchhoff’s Plate theory. The mass of PZT patches remain constant in all cases. In case of actuation, applied voltage considered are 1, 2 and 3 mV. The external excitation to the plate is in the form of harmonically varying point load of 1 mN. It is noticed that cross type PZT patch is more effective in deflection suppression of plate than that of line type PZT patch at 3 mV of actuation at patch thickness of 0.75 μm. Suppression of central deflection of plate for line type and cross type PZT patches are obtained in different frequency bands of (175–185 Hz) and (870–880 Hz) respectively.
Abstract- Power generation in a nuclear plant is dependent on the Nuclear steam supply system (th... more Abstract- Power generation in a nuclear plant is dependent on the Nuclear steam supply system (thermal energy source), the turbine generator (energy conversion), the circulating water system (heat rejection) and condensate/feed water system (regenerative heat and recycle of working fluid) and the plant electric system supporting these. These power generation processes must be operated so as to maintain energy and mass balance under changing conditions of load and environment. Grid electrical disturbances cause significant deviations in grid supply voltage and frequency. The abnormal conditions that accompany the imposition of grid electrical disturbances on a nuclear plant can disrupt the dynamic state of process systems equilibrium. The impact of grid electrical disturbances are in two different ways viz. (i) process degradation and (ii) impact on electrical components. Analysis of both these aspects are required to be carried out to design efficient reactor system high plant avail...
Power generation in a nuclear plant is dependent on the Nuclear steam supply system (thermal ener... more Power generation in a nuclear plant is dependent on the Nuclear steam supply system (thermal energy source), the turbine generator (energy conversion), the circulating water system (heat rejection) and condensate/feed water system (regenerative heat and recycle of working fluid) and the plant electric system supporting these. These power generation processes must be operated so as to maintain energy and mass balance under changing conditions of load and environment. Grid electrical disturbances cause significant deviations in grid supply voltage and frequency. The abnormal conditions that accompany the imposition of grid electrical disturbances on a nuclear plant can disrupt the dynamic state of process systems equilibrium. The impact of grid electrical disturbances are in two different ways viz. (i) process degradation and (ii) impact on electrical components. Analysis of both these aspects are required to be carried out to design efficient reactor system high plant availability. I...
Content Atmospheric pressure glow discharges (APGD) based on dielectric barrier discharge (DBD) o... more Content Atmospheric pressure glow discharges (APGD) based on dielectric barrier discharge (DBD) offer the prospect of a future basic technolo8 for low-tcmperature proccssing of gaseous and solid materials without the use of a vacuum chaiuber 1}. DBD based atmospheric preveure plasma jets (APPJ’s) have wide range of potential applications such as thin film deposition |2J, sterilization |3], surface modification 4-5) , and etching |GJ . Important properties of this type of plasma are that it operates near room temperature, allows treatment of irregular surfaces and has a small penetration depth 7) . A floating helix electrode configuration 8] was implemented for generation of atmospheric pressure DBD based cold plasma jet using Ar/He gas. In this paper, floating helix electrode configuration has been used to genei-ate atmospheric pressure DBD based cold plasma jet using a mixture of argon and nitrogen gas. It was subjected to a range of supply frequencies (10-25 kHz) and supply voltag...
In this study, an atmospheric pressure dielectric barrier discharge-based argon plasma jet has be... more In this study, an atmospheric pressure dielectric barrier discharge-based argon plasma jet has been modeled using COMSOL Multiphysics, which is based on the finite element method. The fluid dynamics and plasma modules of COMSOL Multiphysics code have been used for the modeling of the plasma jet. The plasma parameters, such as electron density, electron temperature, and electrical potential, have been examined by varying the electrical parameters, that is, supply voltage and supply frequency for both cases of static and with the flow of argon gas. The argon gas flow rate was fixed at 1 l/min. Ring electrode arrangement is subjected to a range of supply frequencies (10–25 kHz) and supply voltages (3.5–6 kV). The experimental results of the ring electrode configuration have been compared with the simulation analysis results. These results help in establishing an optimized operating range of the dielectric barrier discharge-based cold plasma jet in the glow discharge regime without arci...
The European Physical Journal Applied Physics, 2018
In this paper, a dielectric barrier discharge plasma based atmospheric pressure plasma jet has be... more In this paper, a dielectric barrier discharge plasma based atmospheric pressure plasma jet has been generated in a floating helix and floating end ring electrode configuration using mixture of argon and nitrogen gases (50:50 ratio). This configuration is subjected to a range of supply frequencies (10–25 kHz) and supply voltages (6.5–9.5 kV) at a fixed rate of gas flow rate (i.e., 1 l/min). The electrical characterization of the plasma jet has been carried out using a high voltage probe and current transformer. The current–voltage characteristics have been analyzed, and the power consumed by the device has been estimated at different applied combinations of supply frequency and voltages for optimum power consumption and maximum jet length. A comparative analysis of the results of the above experiments has shown that maximum power consumed by the device in helix electrode configuration with end ring is 19 W for (Ar+N2) mixture as compared to only 12 mW and 7.7 mW for Ar and He gas res...
In this study, an atmospheric pressure cold plasma jet has been generated based on dielectric bar... more In this study, an atmospheric pressure cold plasma jet has been generated based on dielectric barrier discharge plasma. The double ring electrode configuration is used and analysis has been performed subjected to wide range of supply frequencies up to 25 kHz and supply voltage up to 6 kV. The electrical characterization of the plasma jet has been carried out using a high voltage probe. The V-I characteristics of the developed cold plasma jet have been studied and the consumption of the power has been analyzed at various input combinations of supply frequency and applied voltage. Consequently, the supply voltage and supply frequency are optimized with respect to the discharge current and jet length for optimum power consumption. The peak power consumed for glow discharge operation has been found to be 1.27 W in the optimized configuration.
In this paper, a dielectric barrier discharge plasma based atmospheric pressure plasma jet has be... more In this paper, a dielectric barrier discharge plasma based atmospheric pressure plasma jet has been generated in a floating helix and floating end ring electrode configuration using argon and helium gases. This configuration is subjected to a range of supply frequencies (10-25 kHz) and supply voltages (2-6 kV) at a fixed rate of gas flow rate (i.e., 1 l/min). The electrical characterization of the plasma jet has been carried out using a high voltage probe and current transformer. The current-voltage characteristics have been analyzed, and the consumed power has been estimated at different applied combinations for optimum power consumption at maximum jet length. The obtained optimum power and jet length for argon and helium gases are 12 mW and 32 mm, and 7.7 mW and 42 mm, respectively. It is inferred that besides the electrode configurations, the discharge gas is also playing a significant role in the low power operation of the cold plasma jet at maximum jet length. The obtained results are interpreted on the basis of penning processes.
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Papers by G Divya Deepak