pCooling of an age-hardenable aluminum alloy after the high temperature forming process influences the metallurgical structure and, hence, the mechamcal properties of the part. An intelligent spray quenching system is proposed which selects the optimal spray nozrle configuration based on part geometry and composition such that the quenched part attains superior mechanical properties. The presen...

The water spray systems are effective protection systems in the confined or unconfined spaces to avoid the damage to building structures since the high temperature when fires occur. NFPA 15 and 502 have suggested respectively that the factories or vehicle tunnels install water spray systems to protect the machinery and structures. This study discussed the cooling effect of water spray systems i...

Scalar dissipation rate is an essential parameter in combustion theory; understanding its behavior is necessary for developing and improving combustion models. In most cases, the scalar dissipation rate shows different trends under different combustion conditions, and it is thus case-dependent. Spray combustion is categorized as a partially-premixed combustion system, leading to very complex pr...

in this study, the effect of foliar spray with calcium chloride (0, 0.75, 1.5 and 3 g l-1) during 2, 4 and 6 weeks before commercial harvesting time of apple fruit cv. ‘gala’ and ‘delbarestival’ which trained in three different systems (v shape, hightech and cordon) was investigated. the results showed that types of training systems and foliar application of calcium can affect on fruits quality...

Design and manufacturing technology of high pressure multistage pumps which are commonly utilized in oil and gas industries, used to be imported from foreign companies. Due to international sanctions against I. R. Iran, it started to be designed and launched domestically. Nowadays all production lines including design, manufacturing and testing of these pumps have been performed by Iranian expe...

the spray characteristics of the fuel greatly influence emissions from diesel engines. spray development plays a vital role in improving the combustion and emission characteristics of fuel because it directly affects the air- fuel mixture formation. the spray characteristics of fuel mainly depend on fuel injection process, fuel density, fuel viscosity, ambient pressure and temperature. among th...

the type of training system and application of calcium spray have considerable effects on storability of fruits. in this study, the effects of calcium chloride spray (0, 0.75, 1.5 and 3 g.l-1) in three times during 2, 4 and 6 weeks before harvest time on apple (malus domestica) fruits cvs. ‘gala’ and ‘delbarestival’, which trained in three different training systems (v shape, hightech and cordo...

Multi-storey building must be equipped with a reliable fire extinguishing system. The existing system design is not backup pump and jockey pump. Based on DKI Jakarta Governor Regulation No. 92/2014 the Indonesian National Standard, to solve this problem, designed combination of pump, main that connected in an integrated parallel arrangement. This allows automatically run due pressure drop pipe ...

An indigenously developed chemical spray pyrolysis system was used to deposit polycrystalline CuInS2 thin films. It was found that smaller spray rate results in films with better crystallinity and lower resistivity. Increase in surface roughness of the films was observed for higher spray rates. Variations in film stoichiometry with composition of spray solution were analyzed along with its opto...