نتایج جستجو برای: shock tube
تعداد نتایج: 198791 فیلتر نتایج به سال:
A code using the MacCormack scheme modified t o be TVD has been written t o analyze the flow in a magnetohydrodynamic conductivity channel driven by a reflected shock tube with a heated driver. Items considered include the thermodynamic and electrical properties of the potassium-seeded plasma, both with and without a current applied along the flow, and the steady-state test t ime in the channel...
Forced nonlinear acoustic oscillations near the resonant frequency of closed and open tubes are studied experimentally. In particular, the motion in tubes terminated with different orifice plates is studied, and comparison is made with secondand third-order theories of the motion which contain an adjustable endwall reflexion coefficient. It is found that oscillations at resonance in an open tub...
Blast waves generated by improvised explosive devices (IEDs) cause traumatic brain injury (TBI) in soldiers and civilians. In vivo animal models that use shock tubes are extensively used in laboratories to simulate field conditions, to identify mechanisms of injury, and to develop injury thresholds. In this article, we place rats in different locations along the length of the shock tube (i.e., ...
A number of experimental models of blast brain injury have been implemented in rodents and larger animals. However, the variety of blast sources and the complexity of blast wave biophysics have made data on injury mechanisms and biomarkers difficult to analyze and compare. Recently, we showed the importance of rat position toward blast generated by an external shock tube. In this study, we furt...
Nasogastric (NG) tube insertion is a routine procedure performed for variety of indications, such as delivering enteral nutrition. NG tubes can be associated with complications, including knotting the tube. The case 68-year-old who was admitted to hospital AIDS complicated by septic shock presented. patient received an provide nutrition, which subsequently found clogged. An X-ray pharynx reveal...
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