The distance radiation waves that supersonically propagate in optically thick, diffusive media are energy sensitive. A blast wave can form in a material when the initially diffusive, supersonic radiation wave becomes transonic. Under specific conditions, the blast wave is visible with radiography as a density perturbation. [Peterson et al., Phys. Plasmas 13, 056901 (2006)] showed that the time-integrated drive energy can be measured using blast wave positions with uncertainties less than 10% at the Z Facility. In some cases, direct measurements of energy loss through diagnostic holes are not possible with bolometric and x-ray radiometric diagnostics. Thus, radiography of high compression blast waves can serve as a complementary technique that provides time-integrated energy loss through apertures. In this paper, we use blast waves to characterize the energy emerging through a 2.4 mm aperture and show experimental results in comparison to simulations.
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http://dx.doi.org/10.1063/1.2992295 | DOI Listing |
Sci Rep
January 2025
Hebei University of Architecture, Hebei, 075000, China.
Relying on the Beijing-Zhangjiakou high-speed railway Cao Mao Shan tunnel project, blasting vibration monitoring and sound wave testing experiments were carried out. The monitoring results show that the blasting vibration velocity corresponding to the initial support satisfies the Sadowski formula. The results of the sonic test show that with the increase of blasting times, the cumulative damage increases gradually, but the blasting damage increment shows a downward trend.
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January 2025
Department of Military Traffic Injury Prevention and Control, Daping Hospital, Army Medical University, No. 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, China.
The incidence of blast injuries has been rising globally, particularly affecting the lungs due to their vulnerability. Primary blast lung injury (PBLI) is associated with high morbidity and mortality rates, while early diagnostic methods are limited. With advancements in medical technology, and portable handheld ultrasound devices, the efficacy of ultrasound in detecting occult lung injuries early remains unclear.
View Article and Find Full Text PDFSensors (Basel)
January 2025
School of Mechanical, Aerospace & Civil Engineering, University of Sheffield, Sheffield S1 3JD, UK.
Stress wave dispersion can result in the loss or distortion of critical high-frequency data during high-strain-rate material tests or blast loading experiments. The purpose of this work is to demonstrate the benefits of correcting stress wave dispersion in split-Hopkinson pressure bar experiments under various testing situations. To do this, an innovative computational algorithm, SHPB_Processing.
View Article and Find Full Text PDFEnviron Res
January 2025
School of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China; Zijin School of Geology and Mining, Fuzhou University, Fuzhou, Fujian, 350108, China; Fujian Key Laboratory of Green Extraction and High-value Utilization of Energy Metals, Fuzhou University, Fuzhou, Fujian 350108, China.
In this study, combination of wave absorption materials with different loss mechanisms are added into iron ore tailings-blast furnace slag (IOT-BFS) based geopolymers. The employed materials are hollow glass microsphere (HGM), carbon nanotubes (CNT) and carbonyl iron powder (CIP). Microstructures of the geopolymers are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and concrete porous structure analyzer.
View Article and Find Full Text PDFWiad Lek
December 2024
STATE INSTITUTION ≪INSTITUTE OF OTOLARYNGOLOGY NAMED AFTER PROF. O.S. KOLOMIYCHENKO OF THE NATIONAL ACADEMY OF MEDICAL SCIENCES OF UKRAINE≫, KYIV, UKRAINE.
Objective: Aim: To improve the effectiveness of surgical treatment for patients with post-traumatic tympanic membrane perforations and concurrent Eustachian tube dysfunction through simultaneous combined surgical methods.
Patients And Methods: Materials and Methods: We analyzed clinical and functional outcomes of 35 patients (mean age: 34 ± 10,5 years) with tympanic membrane perforations caused by acoustic and blast injuries. The patients were divided into two groups: the first group (n=17) underwent only tympanoplasty type 1, while the second group (n=18) underwent simultaneous septoplasty, inferior turbinectomy, and tympanoplasty with prolonged middle ear ventilation using a subanular Silverstein tube.
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