Topic
Chamber pressure
About: Chamber pressure is a research topic. Over the lifetime, 2988 publications have been published within this topic receiving 30725 citations.
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TL;DR: In this paper, the authors described a Chinese unique 490 N liquid apogee engine, Model FY-25, which has been flight qualified for use in 6 satellites using storable nitrogen tetroxide (NTO) and monomethylhydrazine (MMH) propellants.
25 citations
TL;DR: In this paper, an array of 2 £ 2 inductively coupled plasma (ICP) sources has been built by modifying the conventional reactive ion etching (RIE) type LCD etcher.
25 citations
Journal Article•
TL;DR: In this paper, the authors introduced a novel and inflatable chamber for hypoxia experiments, which yielded reproducible and comparable results as the modular incubator chamber did in the experiments that require hypoxic conditions.
Abstract: Tissue hypoxia is a common pathophysiological process. Since 1990s, numerous studies have focused on investigating cellular adaptation to experimental hypoxia. A modular incubator chamber made of solid materials has frequently been used in the experiments that require hypoxic conditions. Here, we introduce a novel and inflatable chamber for hypoxia experiments. In experiments detecting hypoxia-induced accumulation of hypoxia-inducible factor 1α (HIF-1α) and hypoxia-induced expression of HIF-1-regulated genes, the new chamber yielded reproducible and comparable results as the modular incubator chamber did. The new chamber did not create inner chamber pressure during its use. Other properties of the new chamber were low-cost, easy to use, and leakage-free. Moreover, the size of the new chamber was adjustable, and the smaller one could be placed onto an inverted microscope for real-time studies. The successful examples of real-time studies included the real-time recording of GFP-HIF-1α fusion nuclear translocation and endothelial cell tubular formation.
25 citations
TL;DR: In this article, the authors examined the excitation of thermoacoustic instability of lean premixed hydrogen-methane/air low swirl flames under both atmospheric and elevated pressure conditions.
25 citations
TL;DR: In this article, a comprehensive theoretical model was formulated to study the development of convective burning in a solid propellant crack which continually deforms due to burning and pressure loading, and the effect of interrelated structural deformation and combustion processes was included in the theoretical model.
Abstract: A comprehensive theoretical model was formulated to study the development of convective burning in a solid propellant crack which continually deforms due to burning and pressure loading The effect of interrelated structural deformation and combustion processes was included in the theoretical model The set of coupled, nonlinear, governing partial-differential equations was solved numerically Several regions of partial crack closures were observed experimentally in narrow cracks (gap width -450 /on) Predicted results indicate that the partial closures may generate substantial local pressure peaks along the crack, implying a strong coupling between chamber pressurization, crack combustion, and propellant deformation, especially when cracks are narrow and chamber pressurization rates are high Predicted results for ignition-front propagation and pressure distribution are in good agreement with experimental data Both theoretical and experimental results indicate that the maximum pressure in the crack cavity is generally higher than that in the chamber Under the conditions studied, it was found that the initial flame-spreading process is not affected substantially by propellant deformation
25 citations