Experimental and numerical investigation of shock wave propagation through complex geometry, gas continuous, two-phase media

Liu, James Chien-Chih

doi:10.2172/379955

Cited by 7 publications

(9 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pressure exerted on the structural first wall by the gas can also be investigated. 24,25 Another crucial issue is the propagation of target and ablated gas up the beamlines where it could deposit and cause arcing between the still unneutralized beam and the tube wall. Although pockets can be designed to maximize gas venting in directions opposite to the beamlines, TSUNAMI helped recognize that this approach would not be effective enough.…”

Section: Iiia3 Shock Propagation Through Chambermentioning

confidence: 99%

“…6 Chen 42 developed the first 1-D version to assess X-ray ablation and hydrodynamics expansion of target debris and ablated molten salt in the interior of the thick-liquid pocket. Concurrently, Liu 24,25 wrote the first 2-D version of TSUNAMI to model hydrodynamics venting through the "slot" array of slab jets. In addition, Liu 24 developed a 1-D version that included a condensation0evaporation model.…”

Section: Iva3 Tsunamimentioning

confidence: 99%

“…Concurrently, Liu 24,25 wrote the first 2-D version of TSUNAMI to model hydrodynamics venting through the "slot" array of slab jets. In addition, Liu 24 developed a 1-D version that included a condensation0evaporation model. TSUNAMI was later modified and employed to model ablation and gas dynamics phenomena in the NIF target chamber.…”

Section: Iva3 Tsunamimentioning

confidence: 99%

See 2 more Smart Citations

IFE Thick Liquid Wall Chamber Dynamics: Governing Mechanisms and Modeling and Experimental Capabilities

Raffray

Meier

Abdel‐Khalik

et al. 2006

Fusion Science and Technology

View full text Add to dashboard Cite

show abstract

Section: Iiia3 Shock Propagation Through Chambermentioning

confidence: 99%

Section: Iva3 Tsunamimentioning

confidence: 99%

See 1 more Smart Citation

IFE Thick Liquid Wall Chamber Dynamics: Governing Mechanisms and Modeling and Experimental Capabilities

Raffray

Meier

Abdel‐Khalik

et al. 2006

Fusion Science and Technology

View full text Add to dashboard Cite

show abstract

“…Real gas effects were taken into account through an approximate model. Concurrently, Liu [40,38,39] wrote the first two-dimensional (2-D)…”

Section: Code History and Usementioning

confidence: 99%

Gas Transport and Control in Thick-Liquid Inertial Fusion PowerPlants

Debonnel

2006

View full text Add to dashboard Cite

Among the numerous potential routes to a commercial fusion power plant, the inertial path with thick-liquid protection is explored in this doctoral dissertation. Gas dynamics phenomena in such fusion target chambers have been investigated since the early 1990s with the help of a series of simulation codes known as TSUNAMI. For this doctoral work, the code was redesigned and rewritten entirely to enable the use of modern programming techniques, languages and software; improve its user-friendliness; and refine its ability to model thick-liquid protected chambers. The new ablation and gas dynamics code is named "Visual Tsunami" to emphasize its graphics-based pre-and post-processors. It is aimed at providing a versatile and user-friendly design tool for complex systems for which transient gas dynamics phenomena play a key role. Simultaneously, some of these improvements were implemented in a previous version of the code; the resulting code constitutes the version 2.8 of the TSUNAMI series.Visual Tsunami was used to design and model the novel Condensation Debris Experiment (CDE), which presents many aspects of a typical Inertial Fusion Energy (IFE) system and has therefore been used to exercise the code. Numerical and experimental results are in good 2 agreement.In a heavy-ion IFE target chamber, proper beam and target propagation set stringent requirements for the control of ablation debris transport in the target chamber and beam tubes.When the neutralized ballistic transport mode is employed, the background gas density should be adequately low and the beam tube metallic surfaces upstream of the neutralizing region should be free of contaminants. TSUNAMI 2.8 was used for the first simulation of gas transport through the complex geometry of the liquid blanket of a hybrid target chamber and beam lines. Concurrently, the feasibility of controlling the gas density was addressed with a novel beam tube design, which introduces magnetic shutters and a long low-temperature liquid vortex; this beam tube configuration was included in the first thick-liquid heavy-ion fusion point design, the so-called Robust Point Design 2002. Additionally, novel, alternative thick-liquid chambers that can accommodate the assisted-pinch, the solenoidal final-focusing, or a Z-pinch driver are discussed.Prof.

show abstract

“…TSUNAMI [24]) have been used to simulate the response of the liquid pocket and crossing jets that protect the beam ports. Experiments such as the shock tube experiments at UCB [24] that help benchmark these codes are needed. Work on vaporization and condensation is needed.…”

Section: Response To Fusion Pulsementioning

confidence: 99%

Chamber technology concepts for inertial fusion energy—three recent examples

Meier

Moir

Abdou

1998

Fusion Engineering and Design

View full text Add to dashboard Cite

The most serious challenges in the design of chambers for inertial fusion energy (IFE) are: (1) protecting the first wall from fusion energy pulses on the order of several hundred megajoules released in the form of X-rays, target debris, and high energy neutrons; and (2) operating the chamber at a pulse repetition rate of 5 -10 Hz (i.e. re-establishing the wall protection and chamber conditions needed for beam propagation to the target between pulses). In meeting these challenges, designers have capitalized on the ability to separate the fusion burn physics from the geometry and environment of the fusion chamber. Most recent conceptual designs use gases or flowing liquids inside the chamber. Thin liquid layers of molten salt or metal and low pressure, high-Z gases can protect the first wall from X-rays and target debris, while thick liquid layers have the added benefit of protecting structures from fusion neutrons thereby significantly reducing the radiation damage and activation. The use of thick liquid walls is predicted to: (1) reduce the cost of electricity by avoiding the cost and down time of changing damaged structures; and (2) reduce the cost of development by avoiding the cost of developing a new, low-activation material. Various schemes have been proposed to assure chamber clearing and renewal of the protective features at the required pulse rate. Representative chamber concepts are described, and key technical feasibility issues are identified for each class of chamber. Experimental activities (past, current and proposed) to address these issues and technology research and development needs are discussed. Published by Elsevier Science S.A. All rights reserved.

show abstract

Experimental and numerical investigation of shock wave propagation through complex geometry, gas continuous, two-phase media

Cited by 7 publications

References 10 publications

IFE Thick Liquid Wall Chamber Dynamics: Governing Mechanisms and Modeling and Experimental Capabilities

IFE Thick Liquid Wall Chamber Dynamics: Governing Mechanisms and Modeling and Experimental Capabilities

Gas Transport and Control in Thick-Liquid Inertial Fusion PowerPlants

Chamber technology concepts for inertial fusion energy—three recent examples

Contact Info

Product

Resources

About