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Volumn 83, Issue 5, 1998, Pages 2420-2427

Small-scale laboratory measurement and simulation of a thermal precursor shock

Author keywords

[No Author keywords available]

Indexed keywords

COMPRESSIBLE FLOW; DENSITY (SPECIFIC GRAVITY); INTERFEROMETRY; LASER PULSES; SPECTROSCOPY; TURBULENCE;

EID: 0032021620     PISSN: 00218979     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.367001     Document Type: Article
Times cited : (9)

References (29)
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    • L. F. Henderson, P. Colella, and E. G. Puckett, J. Fluid Mech. 224, 1 (1991); G. P. Schneyer and D. E. Wilkins, Thermal Layer-Shock Interaction (Precursor) Simulation Data Book. S-Cubed Report SSS-R-84-6584, March 1, 1984; J. R. Barthel, C. E. Needham, T. H. Pierce, and G. P. Schneyer, A Computational Model for Precursed Airblasts over Rough Surfaces, Defense Nuclear Agency Report DNA-TR-89-244, November, 1990; A. M. Abd-El-Fattah, L. F. Henderson, and A. Lozzi, J. Fluid Mech. 76, 157 (1976); H. Reichenbach, Laboratory-Scale Airblast Precursor Experiments, Vol. III, Defense Nuclear Agency Report DNA-TR-85-352-V3 (1989).
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    • Thermal Layer-Shock Interaction (Precursor) Simulation Data Book
    • March 1
    • L. F. Henderson, P. Colella, and E. G. Puckett, J. Fluid Mech. 224, 1 (1991); G. P. Schneyer and D. E. Wilkins, Thermal Layer-Shock Interaction (Precursor) Simulation Data Book. S-Cubed Report SSS-R-84-6584, March 1, 1984; J. R. Barthel, C. E. Needham, T. H. Pierce, and G. P. Schneyer, A Computational Model for Precursed Airblasts over Rough Surfaces, Defense Nuclear Agency Report DNA-TR-89-244, November, 1990; A. M. Abd-El-Fattah, L. F. Henderson, and A. Lozzi, J. Fluid Mech. 76, 157 (1976); H. Reichenbach, Laboratory-Scale Airblast Precursor Experiments, Vol. III, Defense Nuclear Agency Report DNA-TR-85-352-V3 (1989).
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    • Schneyer, G.P.1    Wilkins, D.E.2
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    • A Computational Model for Precursed Airblasts over Rough Surfaces
    • November
    • L. F. Henderson, P. Colella, and E. G. Puckett, J. Fluid Mech. 224, 1 (1991); G. P. Schneyer and D. E. Wilkins, Thermal Layer-Shock Interaction (Precursor) Simulation Data Book. S-Cubed Report SSS-R-84-6584, March 1, 1984; J. R. Barthel, C. E. Needham, T. H. Pierce, and G. P. Schneyer, A Computational Model for Precursed Airblasts over Rough Surfaces, Defense Nuclear Agency Report DNA-TR-89-244, November, 1990; A. M. Abd-El-Fattah, L. F. Henderson, and A. Lozzi, J. Fluid Mech. 76, 157 (1976); H. Reichenbach, Laboratory-Scale Airblast Precursor Experiments, Vol. III, Defense Nuclear Agency Report DNA-TR-85-352-V3 (1989).
    • (1990) Defense Nuclear Agency Report DNA-TR-89-244
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    • L. F. Henderson, P. Colella, and E. G. Puckett, J. Fluid Mech. 224, 1 (1991); G. P. Schneyer and D. E. Wilkins, Thermal Layer-Shock Interaction (Precursor) Simulation Data Book. S-Cubed Report SSS-R-84-6584, March 1, 1984; J. R. Barthel, C. E. Needham, T. H. Pierce, and G. P. Schneyer, A Computational Model for Precursed Airblasts over Rough Surfaces, Defense Nuclear Agency Report DNA-TR-89-244, November, 1990; A. M. Abd-El-Fattah, L. F. Henderson, and A. Lozzi, J. Fluid Mech. 76, 157 (1976); H. Reichenbach, Laboratory-Scale Airblast Precursor Experiments, Vol. III, Defense Nuclear Agency Report DNA-TR-85-352-V3 (1989).
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    • L. F. Henderson, P. Colella, and E. G. Puckett, J. Fluid Mech. 224, 1 (1991); G. P. Schneyer and D. E. Wilkins, Thermal Layer-Shock Interaction (Precursor) Simulation Data Book. S-Cubed Report SSS-R-84-6584, March 1, 1984; J. R. Barthel, C. E. Needham, T. H. Pierce, and G. P. Schneyer, A Computational Model for Precursed Airblasts over Rough Surfaces, Defense Nuclear Agency Report DNA-TR-89-244, November, 1990; A. M. Abd-El-Fattah, L. F. Henderson, and A. Lozzi, J. Fluid Mech. 76, 157 (1976); H. Reichenbach, Laboratory-Scale Airblast Precursor Experiments, Vol. III, Defense Nuclear Agency Report DNA-TR-85-352-V3 (1989).
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    • note
    • Technically, the image intensity variations are proportional to fluctuations in the square of the index of refraction.
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    • The constant a was calculated by Sedov (ibid.), who solved the equations of motion in ID spherical geometry for given values of the adiabatic index γ. (Dependence on γ is the result of energy being tied up in excited or ionized states and, therefore, not available to produce pressure.) For typical values of γ, such as 5/3, 7/5, and 6/5, a was determined to be 0.47, 0.84, and 1.7, respectively. In our experiment, if all of the laser energy is transformed into explosion energy then α∼ 2. But if only 85% of the laser energy is absorbed by the mylar target then α would be 1.7, implying a postshock γ of 6/5. Laser absorption of 85% is consistent with literature on the absorption of laser light by solid targets, [ex, B. H. Ripin et al., Phys. Fluids 23, 1012 (1980)].
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    • The constant a was calculated by Sedov (ibid.), who solved the equations of motion in ID spherical geometry for given values of the adiabatic index γ. (Dependence on γ is the result of energy being tied up in excited or ionized states and, therefore, not available to produce pressure.) For typical values of γ, such as 5/3, 7/5, and 6/5, a was determined to be 0.47, 0.84, and 1.7, respectively. In our experiment, if all of the laser energy is transformed into explosion energy then α∼ 2. But if only 85% of the laser energy is absorbed by the mylar target then α would be 1.7, implying a postshock γ of 6/5. Laser absorption of 85% is consistent with literature on the absorption of laser light by solid targets, [ex, B. H. Ripin et al., Phys. Fluids 23, 1012 (1980)].
    • (1980) Phys. Fluids , vol.23 , pp. 1012
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.