Abstract Aeronautical compressor fans currently operate with minimal blade-casing clearance. This therefore makes the occurrence of rub events very likely. Under specific circumstances, blade undergoes excessive amplification contact-induced oscillations, called hereafter divergence, which can be critical for structural integrity engine. paper proposes an investigation mechanisms responsible di...

A finite element model was generated of a Søderberg electrode in a ferromanganese smelter. In this model, the casing and fins were modelled explicitly, and temperature-dependent material properties were included. A two-stage analysis procedure was used, the first part being a coupled thermal-electrical analysis using an applied DC current. As the casing material was non–magnetic, the DC current...

To solve the housing damage problem of a fractured compressor blade (CB) caused by an impact on inner casing gas turbine in seventh stage (from 15 stages), modifications trailing edge (TE) CB have been proposed, namely 6.5 mm curved cutting and combination 4 straight with cutting. The simulation results both aerodynamics variables Cl Cd pressure ratio, including structural dynamics such as norm...

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...

ABSTRACT The cultivation of button mushroom has reached a high technological level in developed countries and is associated with productivity indices. This involves not only compost production crop management but also the casing layer. Peat been established as one most appropriate materials for due to its excellent properties. However, good-quality peat available all countries, renewable, which...

This study was conducted to evaluate small-scale hot-water postpackaging pasteurization (PPP) as a postlethality (post-cooking) treatment for Listeria monocytogenes on ready-to-eat beef snack sticks and natural-casing wieners. Using a commercially available plastic packaging film specifically designed for PPP applications and 2.8 liters of boiling water (100 degrees C) in a sauce pan on a hot p...

Stress state analysis to casing-cement sheathformation system (CCSFS) is the foundation of the wellbore integrity design and examination. Many elastic mechanic models have been established to calculate the stresses and displacements of CCFS, but all analytical models and most finite element models took no account of the initial loaded state, and ignored the initial stresses and displacements on...