abstract: impeller trimming is a proper way to alter the performance of centrifugal pump with a constant speed so as to meet the demand on the specified flow rate and head in pumping systems. the affinity law accounting for the impeller trimming is the key relation to determine the pump performance with a trimmed impeller. there seems no experimental study dealing with such an affinity law for ...

The compositions of the various organic and inorganic species in cane molasses show wide variations. Centrifugation can be used to remove suspended so!id particles. The bulk of these are precipitated calcium compounds. Removal of calcium by precipitation and subsequent centrifugation can be enhanced by the addition of sulphuric acid. The effects of dilution, temperature, and acid addition on th...

Combustion Turbine Generator merupakan salah satu power generator yang menggunakan sebuah turbin untuk menghasilkan energi listrik. CTG mengonversikan mekanik menjadi Untuk mendapatkan udara dengan tekanan tinggi, maka intake dibakar dalam combustion chamber firing system berupa fuel oil dan gas. Fuel ditampung pada tangki penyimpanan bahan bakar. memindahkan fluida dari ke sistem 3 unit diperl...

A centrifugal method was used to analyze and evaluate particle–surface interactions. Particles with count median diameters of 9.7, 14.5, 32.8 μm were removed from horizontally vertically mounted metal substrates. point-mass model is conventionally the forces exerted on particles during centrifugation. Conversely, in this study, a rigid-body employed considering particle diameter effective conta...

This study presents a method for fabrication of ultrafine polymeric nanofibers as well as nano/micro particles utilizing centrifugal and electrostatic forces simultaneously. To reduce the diameter and variety of nanofibers produced from solid state polymerized PA66, a unique electrocentrifuge spinning device was utilized with a rotating nozzle and collector, while the fabrication process (spinn...

In recent years, computational fluid dynamics has been increasingly used in the development of various types rotating machines. case water turbines and pumps, a large number researches have published recently, related to use different numerical methods for prediction efficiency, cavitation characteristics dynamic phenomena. For basic analysis an accurate result near optimal operating regime is ...

The state of cytomegalovirus (CMV) after the resolution of acute infection is an unsolved problem in CMV research. While the term "latency" is in general use to indicate the maintenance of the viral genome, a formal exclusion of low-level persistent productive infection depends on the sensitivity of the assay for detecting infectious virus. We have improved the method for detecting infectivity ...

in the current engineering practices, buildings are commonly designed for an effective lifetime of 50 years. this lifetime can increase the cost of buildings with short lifetimes and can reduce the safety level of buildings with large lifetimes. in this paper, a “service-life factor” has been defined. applying this factor into the nominal values of live, earthquake, wind, and snow loads, the ef...

To suppress two-dimensional load sway caused by the horizontal boom motion of a rotary crane, both horizontal and vertical boom motions are generally used. However, it would be more energy efficient and safer if a control scheme using only horizontal boom motion could be developed, eliminating the need for any boom vertical motion. In addition, if we can suppress load sway without the need to m...

coccus suspension with immune serum at 1,800 r.p.m. for 10 minutes, and obtained very encouraging results. Mayer and Dowling (1945) used a centrifugal method for the detection of agglutinins against meningococci and obtained highly specific results. Feldman (1946) used a similar method in the identification of cultures, specially those of the dysentery group. The present paper gives the results...