Experimental investigation and dimensional analysis of friction drilled hole on 6082 aluminium pipe using hardened M2 centre drill

This paper addresses the flow induced rotation phenomena of plates hinged to allow flow induced rotating about their vertical axis. Different transversal shape configurations are studied. The aim of this study is to simplify the fluttering problem that may occur with falling objects in water during installation of offshore devices. The investigation intent is to propose an optimized configuration for stabilizing the fluttering motion of pendulous installation method of manifolds. The experiments and dimensional analysis confirmed that natural frequency is linearly proportional to the incoming flow velocity and inversely proportional to the flat plate width, and also the equivalent harmonic angle of rotation for small oscillation angles is approximately constant in different velocities. Experiments show that the bluffer plates (plate with two stabilizers and plate with stabilizers and nose), by increasing of period of rotation and also decreasing of equivalent harmonic angle of rotation have stabilizing effect in the fluttering motion of falling objects.

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Noise Generated by Cavitation in Orifice Plates

Journal of Fluids Engineering ◽

10.1115/1.3243642 ◽

1989 ◽

Vol 111 (3) ◽

pp. 278-289 ◽

Cited By ~ 8

Author(s):

S. R. Bistafa ◽

G. C. Lauchle ◽

G. Reethof

Keyword(s):

Experimental Investigation ◽

Flow Velocity ◽

Dimensional Analysis ◽

Cavitation Number ◽

Turbulent Shear ◽

Scaling Relations ◽

Source Strength ◽

Acoustic Source ◽

Acoustic Performance ◽

Reciprocity Method

An experimental investigation of the noise generated by cavitation in turbulent shear flows produced by confined sharp-edged orifice plates is reported. The acoustic source strength of cavitation was determined by means of reciprocity type measurements. Two experimental checks of the reciprocity method were performed. Proposed scaling relations, derived from dimensional analysis, were empirically adjusted and used to predict prototype acoustic performance based on the results of model tests. The dependence of the acoustic source strength on flow velocity and cavitation number was determined experimentally and compared with similar results reported in the literature.

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Experimental Investigation and Modeling of Surface Finish in Argon-Assisted Electrical Discharge Machining Using Dimensional Analysis

Arabian Journal for Science and Engineering ◽

10.1007/s13369-019-03738-5 ◽

2019 ◽

Vol 44 (6) ◽

pp. 5839-5850 ◽

Cited By ~ 2

Author(s):

Nishant K. Singh ◽

Yashvir Singh

Keyword(s):

Experimental Investigation ◽

Dimensional Analysis ◽

Surface Finish ◽

Electrical Discharge ◽

Electrical Discharge Machining

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Experimental investigation and model development for effective viscosity of MgO–ethylene glycol nanofluids by using dimensional analysis, FCM-ANFIS and GA-PNN techniques

International Communications in Heat and Mass Transfer ◽

10.1016/j.icheatmasstransfer.2016.01.005 ◽

2016 ◽

Vol 72 ◽

pp. 71-83 ◽

Cited By ~ 41

Author(s):

Saheed Adewale Adio ◽

Mehdi Mehrabi ◽

Mohsen Sharifpur ◽

Josua Petrus Meyer

Keyword(s):

Experimental Investigation ◽

Ethylene Glycol ◽

Dimensional Analysis ◽

Effective Viscosity ◽

Model Development

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Experimental investigation of impact of length and height of parallel skimming walls on controlling inlet sediment to lateral intake

Water Science & Technology Water Supply ◽

10.2166/ws.2020.023 ◽

2020 ◽

Vol 20 (3) ◽

pp. 997-1005

Author(s):

Sadegh Farshidnia ◽

Mojtaba Saneie ◽

Hooman Hajikandi ◽

Mohammad Rostami

Keyword(s):

Experimental Investigation ◽

Dimensional Analysis ◽

Main Channel ◽

Rotational Flow ◽

Sediment Volume ◽

The Impact

Abstract Parallel skimming walls are regarded as one of most applicable methods for gaining a decline in the amount of sediment entering a lateral intake. The parallel skimming walls are installed on the main channel, in front of the intake span, creating a rotational flow and diverting sediments from the intake span, and as a result a reduction in the amount of sediment entry into the intake can be realized. The present paper aims at experimentally studying the impact of length (L) and height (H) of parallel skimming walls, as well as the effect of discharge shifts associated with the main channel on controlling the inlet sediment into the intake. First, the impact of parallel skimming walls incorporating three lengths (L = 60 cm, 75 cm, 90 cm) in front of the intake is investigated, then the impact of skimming walls incorporating three heights (H = 2 cm, 4 cm, 6 cm) is scrutinized. After each test, the sediment volume entry (V) into the intake was measured. By performing dimensional analysis, dimensionless ratios were obtained and the relation between the variables was determined. The results demonstrated that in the case of parallel skimming walls, the increase in L and H leads to mitigation in the amount of inlet sediment into the intake. Moreover, there is a proper agreement between the procedure of this study and the previous ones.

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In situ investigation of the primary recrystallization of alpha titanium in HVEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100110313 ◽

1978 ◽

Vol 36 (1) ◽

pp. 634-635

Author(s):

S. Naka ◽

R. Penelle ◽

R. Valle

Keyword(s):

Dimensional Analysis ◽

Texture Evolution ◽

Cold Work ◽

Three Dimensional ◽

Primary Recrystallization ◽

Thin Foils ◽

In Situ Investigation ◽

Grain Growth Model ◽

Alpha Titanium

The in situ experimentation technique in HVEM seems to be particularly suitable to clarify the processes involved in recrystallization. The material under investigation was unidirectionally cold-rolled titanium of commercial purity. The problem was approached in two different ways. The three-dimensional analysis of textures was used to describe the texture evolution during the primary recrystallization. Observations of bulk-annealed specimens or thin foils annealed in the microscope were also made in order to provide information concerning the mechanisms involved in the formation of new grains. In contrast to the already published work on titanium, this investigation takes into consideration different values of the cold-work ratio, the temperature and the annealing time.Two different models are commonly used to explain the recrystallization textures i.e. the selective grain growth model (Beck) or the oriented nucleation model (Burgers). The three-dimensional analysis of both the rolling and recrystallization textures was performed to identify the mechanismsl involved in the recrystallization of titanium.

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