In this paper, a simulation-based method is proposed for optimal placement of vibration sensors for the purpose of fault detection in a centrifugal pump. The centrifugal pump is modeled to investigate the effect of vane tip fault on fluid flow patterns numerically. Pressure pulsations are investigated at different locations at the inner surface of the pump before and after the presence of the f...

Public concerns about oil and natural gas extraction these days inevitably turn to hydraulic fracturing, where millions of gallons of water, sand, and chemicals are pumped underground at high pressures to crack open rocks. Hydraulic fracturing often occurs a mile or more down, far from the water we drink or the air we breathe. The focus for safety and environmental stewardship should often be s...

This paper presents the design of a low-cost reconfigurable modular robotic platform. Modular robots can come in different forms involving several small modules attached together to form a working and moving robot. This robotic platform aims to be used in future robotics courses as a teaching tool or a prototype for research in modular robotics. The designed prototype is reprogrammable. The ove...

The present study explains a steady-state method of measuring convective heat transfer coefficient on the casing of an axial flow turbine. The goal is to develop an accurate steady-state heat transfer method for the comparison of various casing surface and tip designs used for turbine performance improvements. The freestream reference temperature, especially in the tip gap region of the casing,...

Due to construction costs and operational issues have been in this study discuss how strengthen the concrete columns. The results of previous studies on some structures earthquake-prone weakness reinforced inside steel casings surrounding columns is a modern technique used many countries today for rectangular circular concrete. advantages method convenient, economical easy. Reference model colu...

Screw compressor performance is usually predicted by thermodynamic and fluid flow calculations based on a dimensionless flow model. However factors, which affect the power consumption, delivery and reliability of these machines, such as dynamic flow losses, leakage and oil flow drag, are not estimated accurately by such procedures. By the use of 3-D numerical modelling of the compressor fluid f...

An ultrasonic testing method employing the pulse-echo inspection technique was developed to assess the integrity of annular seals surrounding casings (i.e.. instrument tubes or well casings). This nondestructive testing method permits testing aseal from inside acasing without disturbing the casing, seal. or formation. Seals constructed with cement-based and bentonite-based sealants surrounding ...

This work aims to study the dynamic characteristics of an entire aero-engine casing by experiments using a new type rotating exciter. New vibration sensor layout rules are proposed according experimental results and transmission characteristics. The response is carried out, different measuring points also studied. finite element model engine casing’s structure established obtain natural frequen...

Abstract The stability limit of a tip-stalling axial compressor is sensitive to the magnitude near-casing blockage. In transonic compressors, presence passage shock could be major cause for Identification and elimination this blockage key improving compressor. article, using numerical simulation, within rotor, NASA Rotor 37, quantified parameter. For smooth casing, at conditions near stall maxi...