Superheaters are essential components in a coal-fired power plant because they keep the highest tube wall temperature points radiant boiler. The pressurized steam flowing superheater tubes is heated via thermal radiation and convection from combustion gas. To prevent bursting of caused by fatigue for stable safe operation, precisely predicting complex heat transfer characteristics, estimating l...

Safety assessments and environmental impact statements for facilities require an estimation of airborne releases from accidents. Aerosols generated by accidents are being investigated to develop the source terms for these releases. One example of a severe accidental release event is a pressurized liquid release. Pressurized liquid release experiments performed in static air measured the mass ai...

We study the formation of localized structures formed by the point loading of an internally pressurized elastic shell. While unpressurized shells (such as a ping-pong ball) buckle into polygonal structures, we show that pressurized shells are subject to a wrinkling instability. We study wrinkling in depth, presenting scaling laws for the critical indentation at which wrinkling occurs and the nu...

This paper describes a new method of sensor failure detection, isolation, and accommodation using a neural network approach. In a propulsion system such as the Space Shuttle Main Engine, the dynamics are usually very complicated and sometimes not well known. However, the number of variables measured is usually much higher than the order of the system. This built-in redundancy of the sensors can...

Constant mean curvature (CMC) hypersurfaces in a compact Riemannian manifold (Mm+1, g) constitute an important class of submanifolds and have been studied extensively. In this paper we are interested in degenerating families of such submanifolds which ‘condense’ to a submanifold Kk ⊂ Mm+1 of codimension greater than 1. It is not hard to see that the closer a CMC hypersurface is (e.g. in the Hau...

Abstract Bioenergy combustion with Carbon Capture and Storage (BECCS) is a key technology to achieve carbon negative emissions power generation. This can be achieved by coupling the biofuels CO 2 capture storage (CCS). The lowest cost for CCS corresponds at moment Chemical Looping Combustion (CLC) process. use which gaseous (biomethane, biogas or syngas etc.), liquid (biodiesel, bioethanol, bio...

the importance of groundwater as a source of water supply in arid, semi –arid areas in recent years due to the uncontrolled exploitation of groundwater have been doubled. uncontrolled exploitation has been caused a drop in the water table in many areas of the country, including this region. with replace methods of modern irrigation instead of traditional irrigation methods can prevent drop the ...