Simulation and demonstration of magnetohydrodynamic energy conversion in a high-temperature inert gas

Murakami, Tomoyuki; Okuno, Yoshihiro
March 2009
Physics of Plasmas;Mar2009, Vol. 16 Issue 3, p033501
Academic Journal
The present paper describes high-density magnetohydrodynamic (MHD) energy conversion in a high-temperature seed-free argon plasma, for which a quasi-three-dimensional numerical simulation and a single-pulse shock-tunnel-based demonstration are conducted. The numerical model simulates the two-dimensional profiles of both the electron and the heavy-particle system of the supersonic argon plasma flow, of which the total inflow temperature is 8000 K. The MHD power-generating experiment clarifies the relationship between the plasma quality and the energy conversion efficiency as functions of the total inflow temperature (7600–9600 K) and the applied magnetic flux density (up to 4.0 T). The increase in the total inflow temperature from 7600 to 9400 K and the application of magnetic flux with density of 0.5–1.2 T change the plasma state; unstable behavior accompanied by an inhomogeneous structure is transformed to a homogeneous and stable state, which results in the significant improvement of the power generation performance. Even in low-density magnetic flux, the attained generator performance is comparable or superior to previous results obtained using a conventional low-temperature seeded gas.


Related Articles

  • Honeycomblike large area LaB6 plasma source for Multi-Purpose Plasma facility. Woo, Hyun-Jong; Chung, Kyu-Sun; You, Hyun-Jong; Lee, Myoung-Jae; Lho, Taihyeop; Choh, Kwon Kook; Yoon, Jung-Sik; Jung, Yong Ho; Lee, Bongju; Yoo, Suk Jae; Kwon, Myeon // Review of Scientific Instruments;Oct2007, Vol. 78 Issue 10, p103505 

    A Multi-Purpose Plasma (MP2) facility has been renovated from Hanbit mirror device [Kwon et al., Nucl. Fusion 43, 686 (2003)] by adopting the same philosophy of diversified plasma simulator (DiPS) [Chung et al., Contrib. Plasma Phys. 46, 354 (2006)] by installing two plasma sources: LaB6 (dc)...

  • Electrostatic modes in multi-ion and pair-ion collisional plasmas. Vranjes, J.; Petrovic, D.; Pandey, B. P.; Poedts, S. // Physics of Plasmas;Jul2008, Vol. 15 Issue 7, p072104 

    The physics of plasmas containing positive and negative ions is discussed with special attention to the recently produced pair-ion plasma containing ions of equal mass and opposite charge. The effects of the density gradient in the direction perpendicular to the ambient magnetic field vector are...

  • Low-noise electromagnetic δf particle-in-cell simulation of electron Bernstein waves. Nong Xiang; Cary, John R.; Barnes, Daniel C.; Carlsson, John // Physics of Plasmas;Jun2006, Vol. 13 Issue 6, p062111 

    The conversion of the extraordinary (X) mode to an electron Bernstein wave (EBW) is one way to get rf energy into an overdense plasma. Analysis of this is complex, as the EBW is a fully kinetic wave, and so its linear propagation is described by an intractable integro-differential equation....

  • Lower hybrid current drive at ITER-relevant high plasma densities. Cesario, R.; Amicucci, L.; Calabrò, G.; Cardinali, A.; Castaldo, C.; Marinucci, M.; Panaccione, L.; Pericoli-Ridolfini, V.; Tuccillo, A. A.; Tudisco, O. // AIP Conference Proceedings;11/26/2009, Vol. 1187 Issue 1, p419 

    Recent experiments indicated that a further non-inductive current, besides bootstrap, should be necessary for developing advanced scenario for ITER. The lower hybrid current drive (LHCD) should provide such tool, but its effectiveness was still not proved in operations with ITER-relevant density...

  • Non-Gaussian properties of global momentum and particle fluxes in a cylindrical laboratory plasma. Nagashima, Yoshihiko; Itoh, Sanae -I.; Inagaki, Shigeru; Arakawa, Hiroyuki; Kasuya, Naohiro; Fujisawa, Akihide; Kamataki, Kunihiro; Yamada, Takuma; Shinohara, Shunjiro; Oldenbürger, Stella; Yagi, Masatoshi; Takase, Yuichi; Diamond, Patrick H.; Itoh, Kimitaka // Physics of Plasmas;Jul2011, Vol. 18 Issue 7, p070701 

    Non-Gaussian statistical properties of the azimuthally averaged momentum and particle fluxes driven by turbulence have been simultaneously observed in inhomogeneous magnetized plasmas for the first time. We identified the stretched Gaussian distribution of the both fluxes and the transition from...

  • Measurements of neutral helium density in helicon plasmas. Houshmandyar, Saeid; Sears, Stephanie H.; Thakur, Saikat Chakraborty; Carr, Jerry; Galante, Matthew E.; Scime, Earl E. // Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10D704 

    Laser-induced-fluorescence (LIF) is used to measure the density of helium atoms in a helicon plasma source. For a pump wavelength of 587.725 nm (vacuum) and laser injection along the magnetic field, the LIF signal exhibits a signal decrease at the Doppler shifted central wavelength. The drop in...

  • The effects of plasma density and magnetic field on ion temperature and drift velocity in a LaB6 direct current plasma. Hyun-Jong Woo; Kyu-Sun Chung; Myoung-Jae Lee; Taihyeop Lho // Physics of Plasmas;Feb2009, Vol. 16 Issue 2, pN.PAG 

    In a LaB6 direct current plasma, parallel and perpendicular ion temperatures (Ti∥ and Ti⊥) were measured as a function of plasma density and magnetic field by a laser-induced fluorescence technique. In order to study the impacts of magnetic field and plasma density on ion temperature...

  • Initiation of ecton processes by interaction of a plasma with a microprotrusion on a metal surface. Barengolts, S. A.; Mesyats, G. A.; Tsventoukh, M. M. // Journal of Experimental & Theoretical Physics;Dec2008, Vol. 107 Issue 6, p1039 

    Evolution of rapid (∼10 ns) Ohmic overheating of a microprotrusion on a surface in contact with a plasma by emission current is studied taking into account the energy carried by plasma ions and electrons, as well as Ohmic heating, emissive source of energy release (Nottingham effect), and...

  • Effect of Coulomb Collisions on Low Gas Pressure Plasmas. Nanbu, K.; Furubayashi, T. // AIP Conference Proceedings;2006, Vol. 832 Issue 1, p582 

    A recent trend in material processing plasmas is the use of a low gas pressure and high plasma density. In such plasmas, Coulomb collisions among charged particles has been considered to have a significant effect on plasma structure. By use of Bobylev and Nanbu’s theory [Phy. Rev. E,...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics