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Compact Pulsed Plasma Based High Pressure Shock Wave
Generators for Constrained Liquid Immersed Spaces
  • Overview
  • Quick View Leaflet
  • Detail Technical Brochure
  • Application Procedure

Compact Pulsed Plasma Based High Pressure Shock Wave Generators for Constrained Liquid Immersed Spaces

Underwater Pulsed Plasma Based Shock Wave/Pressure Pulse Generator

Overview

This cylindrical device generates pulsed pressures of ~100MPa amplitude at 5cms distance from the exploding wire location in radial direction. At close distances the pressures are still higher in amplitude. For the generation of pressure, the system needs to be loaded with wire between external electrodes and then is submerged in water and then a high voltage is applied into it.

APPLICATIONS

  • For the generation of pressure/shock waves in underwater/liquid conditions.

  • For the production of metal nano-powder.

  • For the study of metal phase transition at faster di/dt rate through solid-liquid vapor and plasma states.

  • Food tenderization studies.

  • Packaging survivability testing under pressure wave loading.

Compact Pulsed Plasma Based High Pressure Shock Wave Generators for Constrained Liquid Immersed Spaces

 

 

Quick View Leaflet

The device is used to electrically explode the conducting wire of up to 11cm length of 250 micron diameter in underwater conditions. A pressure pulse is generated inside the water which decays with empirical law of (distance)-0.7 from the metal wire. The pressures at 5cm are expected to be ~100Mpa. At close distances the pressures are still higher in amplitude.The system is tested to be working in the saline water which has salinity level to that of near sea water. The discharge is done in sub-microsecond duration in order to mitigate any considerable shunting possibility of electrical energy through the water instead of desired path of the energy deposition. The dimensions are restricted to 115mm in radius and 1.6m in length for single shot application. The weight of the pressure wave generator without any external housing is 40 kgs. The wire is presently clamped between the nut-bolted output connections points which are accessible from outside of the system.

APPLICATIONS

  • For the generation of pressure/shock waves in underwater/liquid conditions.

  • For the production of metal nano-powder.

  • For the study of metal phase transition at faster di/dt rate through solid-liquid vapor and plasma states.

  • Food tenderization studies.

  • Packaging survivability testing under pressure wave loading.

SPECIFICATIONS

Parameter Values
Length 1.6m
Diameter 115mm
Weight ~40kg
Operating voltage 230V single phase
Input power < 150 Watt
Discharge electrical energy 350 Joule maximum
Discharge time Sub -µSec. (0.9µSec)
Wall Pressure (radial@5cm from wire) > 80Mpa
Life >500 shots tested
System output diagnostics
  1. Rogowski coil for the discharge record in the oscilloscope
  2. Attenuated charging voltage on the capacitor bank of the system.

 

Compact Pulsed Plasma Based High Pressure Shock Wave Generators for Constrained Liquid Immersed Spaces

Detail Technical Brochure

This pulsed plasma based pressure/shock wave generator offers advantages that it is electrically driven and highly efficient in terms of electrical energy. More over the System is compact and portable. The generator is high voltage insulated and can work in saline water also. The pressure generated are controlled which do not exceed the ultimate breakdown strength of steel but still beyond the plastics. The high pressures generated are confined in space near exploding conductor. So basic high voltage and high pressure safety is included in the designing and developing the shock wave generator.

PRINCIPLE OF OPERATION

The electrical energy is dissipated in to the metal wire which undergoes transitions from solid to liquid and then to the vapor state. In the vapor state, the resistivity and the rate of rise of resistivity is quite high as further energy is dissipated into the metal wire. This rapid rate of rise of resistivity causes the formation of high temperature high velocity expanding metal plasma which interacts through surrounding media for the generation of strong pressure pulse especially in underwater condition.

 

 

 


FACILITIES AND MANPOWER REQUIRED FOR COMMERCIAL PRODUCTION

  1. Laptop + digitizer or oscilloscope to monitor the discharge pulses. (250MHz or higher bandwidth and 1Gsa/s or higher sampling rate)
  2. Rogowski coil/high bandwidth current transformer and High Voltage probe with multimeter.
  3. Electronic soldering, assembling and testing facility
  4. A good mechanical workshop with facility of milling, drilling, bending, cutting buffing for fabrication of various mounts and chassis of the system. For the placement and mechanical ruggedness of the device the Epoxy molding should also be there.
  5. High Voltage Safety equipments are also required.
  6. One electrical and one mechanical diploma person with experience in pressure testing and high voltage testing may be required for the production and operation of the equipment.

Who Should apply


Interested parties with Engineering & Scientific knowledge, good financial background and adequate experience of products manufacturing & fabrication with technical capability in the area of interested technology and having or interested in setting –up facilities for production would be preferred.


How to apply

Send your Technology Transfer Application form duly filled and signed alongwith a Demand Draft/Bankers cheque of Rs. 500/- (for Indian entities) or US $50/- (for foreign entities) drawn in favour of “Accounts Officer, BARC” as application processing fee on following address: 

Head, Technology Transfer and Collaboration Division 
Bhabha Atomic Research Centre,
Trombay, Mumbai – 400 085, India.

Fax : +91-22-25505151


Note:Applications without processing fee as applicable above of Rs. 500/- or US $50/- for each technology will not be considered.


Click here for Technology Transfer Application Form

Contact Us

Head, 
Technology Transfer and Collaboration Division
Bhabha Atomic Research Centre,
Trombay, Mumbai 400 085.

Fax : 091-022- 25505151
Email : technology@barc.gov.in

How to apply

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