Experimental comparison of two linear machines developed for the free piston engine

Nick.J. Baker; Aslan Sa Jalal; Junwan Wang; Ramin M. Korbekandi

doi:10.1049/joe.2018.8214

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Publication Date

Mon May 20 2019

Journal Name

The Journal Of Engineering

Volume

2019

DOI

10.1049/joe.2018.8214

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Experimental comparison of two linear machines developed for the free piston engine

Nick.J. Baker

Aslan Sa Jalal

Junwan Wang

Ramin M. Korbekandi

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: In this study, a linear synchronous machine is compared with a linear transverse flux machine. Both machines have been designed and built with the intention of being used as the power take off in a free piston engine. As both topologies are cylindrical, it is not possible to construct either using just flat laminations and so alternative methods are described and demonstrated. Despite the difference in topology and specification, the machines are compared on a common base in terms of rated force and suitability for use as a generator. Experience gained during the manufacture of two prototypes is described.

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Publication Date

Mon Jan 01 2024

Journal Name

Anais Da Academia Brasileira De Ciências

Morphological study for Accipitrid birds (Accipitridforms, Accipitridae) in Iraq; part two

A part two of Accipitridae Family members that belong to three genera: Circus

Gyps

and Neophron were documented as morphometrics

distribution ranges

and conservation status were reviewed and comprehensively discussed. A total of 29 voucher specimens belong to six species which are conserved in the “Iraq Natural History Research Center and Museum INHM” as follow: Marsh Harrier Circus aeruginosus (Linnaeus

1758)

Hen Harrier Circus cyaneus (Linnaeus

1766)

Montagus Harrier Circus pygargus (Linnaeus

1758)

Pallid Harrier Circus macrourus (Gmelin

1770)

Egyptian vulture Neophron percnopterus (Linnaeus

1758)

and Griffon vulture Gyps fulfus (Hablitz

1783). The results revealed significant criteria about near threatened NT species IUCN and Birdlife International listed as Pallid Harrier Circus macrourus

and Endangered (EN) species as Egyptian vulture Neophron percnopterus globally decreasing population trend.

HIND D.

KHALIDA I.

AFKAR M.

SUHAD Y.

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Publication Date

Wed May 10 2023

Journal Name

Journal Of Engineering

Free Head Shear Test on Decomposed Granite Soil

decomposed granite soil

free direct shear test

simple shear

triaxial test

angle of internal friction

Haider Mohammed

Abbas Malik

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The study presents the test results of Completely Decomposed Granite (CDG) soil tested under drained triaxial compression, direct shear and simple shear tests. Special attention was focused on the modification of the upper halve of conventional Direct Shear Test (DST) to behave as free
head in movement along with vertical strain control during shear stage by using Geotechnical Digital System (GDS). The results show that Free Direct Shear Test (FDST) has clear effect on the measured shear stress and vertical strain during the test. It has been found that shear strength
parameters measured from FDST were closer to those measured from simple shear and drained triaxial compression test. This study also provides an independent check on

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Publication Date

Sun Jul 09 2023

Journal Name

Journal Of Engineering

The Effect of Ceramic Coating on Performance and Emission of Diesel Engine Operated on Diesel Fuel and Biodiesel Blends

Ceramic coating

diesel engine

engine performance

emission

biodiesel.

Ibtihal

Mahmoud A.

Ali Abu Al-heel

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In this work, the effect of ceramic coating on performance, exhaust gas temperature and gases emissions of diesel engine operated on diesel fuel and biodiesel blends was investigated. A conventional four stroke, direct injected, single cylinder, diesel engine was tested at constant speed and at different load conditions using diesel fuel and biodiesel blends. The inlet and exhaust valves, the head of piston and cylinder head of the engine were coated by ceramic materials. Ceramic layers were made of (210-240) μm of Al2O3 and (30-60) μm of 4NiCr5Al as a bond coat for inlet and exhaust valves and (350-400) μm of YSZ and (50-100) μm of 4NiCr5Al as a bond coat for head of piston and (280-320) μm of Sic and (40-80) μm of 4NiCr5Al as a b

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Publication Date

Sun Jul 01 2001

Journal Name

Bulletin Of The Iraq Natural History Museum (p-issn: 1017-8678 , E-issn: 2311-9799)

CHANGES OF CUTICULAR PROPERTIES IN ADULT EPHESTIA CAUTELLA(WALKER) LEPIDOPTERA: PYRALIDAE, DEVELOPED AFTER CESSATION OF EGGS GROWTH

M. A.R.Y.

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Both normally developed insects and insects developed after cessation of eggs growth were
used in this work. Cessation of eggs growth occurred following abnormal conditions, which
lasted for 3.5 months before developing into adults, due to the war led by the U.S. and her
alliances against Iraq. These insects showed low rates of water contents and an active response
to water loss. Therefore their tolerance of desiccation was weak. In addition, they had an active
ability to restore their water loss quickly, after return them to a culture, this indicates that some
changes occurred in their integumentary properties were not permanent and took their turn
within one population only, but may or may not serve this population

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Publication Date

Thu Mar 02 2023

Journal Name

Iar Journal Of Business Management

Reducing The Costs Of Transporting Multiple Products (Linear Transport Problems) Using Excel QM

Transportation Problem

Multiple Product

Cost

Excel QM.

Basher.F. Mohammed

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The transportation model is a well-recognized and applied algorithm in the distribution of products of logistics operations in enterprises. Multiple forms of solution are algorithmic and technological, which are applied to determine the optimal allocation of one type of product. In this research, the general formulation of the transport model by means of linear programming, where the optimal solution is integrated for different types of related products, and through a digital, dynamic, easy illustration Develops understanding of the Computer in Excel QM program. When choosing, the implementation of the form in the organization is provided.

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Publication Date

Mon May 01 2023

Journal Name

Journal Of Engineering

Assessment of Climate Change Impact on Water Productivity and Yield of Wheat Cultivated Using Developed Seasonal Schedule Irrigation in the Nineveh Province

water productivity

irrigation schedule

Aqua-crop

Nineveh province

climate change

Ban Flaieh

Basim Sh.

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The agricultural lands that depend on supplementary irrigation methods for winter wheat cultivating in wide areas of the Nineveh province are most vulnerable to climate change concerns. Due to frequent rainfall shortages and the temperature increase recently noticed and predicted by the climate scenarios. Hence important to assess the climate effect on the crop response in terms of water consumption during the periods (2021-2040) and (2041-2060) by using high-resolution data extracted from 6 global climate data GCMs under SSP5-8.5 fossil fuel emission scenarios in changing and fixed CO₂ concentration. And validate the Aqua-Crop model to estimate the yield and water productivity. And gives the RRSME of 7.1- 4.1

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Publication Date

Wed Dec 13 2017

Journal Name

Al-khwarizmi Engineering Journal

Experimental Investigations Performance for (VCC) Using 2-Way (PFCV) Type (2FRE)

PFCV

VCC

Experimental

Investigation

Majid Ahmed

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In modern hydraulic control systems, the trend in hydraulic power applications is to improve efficiency and performance. “Proportional valve” is generally applied to pressure, flow and directional-control valves which continuously convert a variable input signal into a smooth and proportional hydraulic output signal. It creates a variable resistance (orifice) upstream and downstream of a hydraulic actuator, and is meter in/meter out circuit and hence pressure drop, and power losses are inevitable. If velocity (position) feedback is used, flow pattern control is possible. Without aforementioned flow pattern, control is very “loose” and relies on “visual” feed back by the operator. At this point, we should examine how this valv

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Publication Date

Mon Jul 24 2023

Journal Name

Journal Of University Of Kerbala

The occurrence of two species of the genus Myxobolus Bütschli, 1882 (Myxozoa: Myxosporea) for the first time in Iraq from freshwater fishes.

Rana

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The occurrence of two species of the genus Myxobolus Bütschli, 1882 (Myxozoa: Myxosporea) for the first time in Iraq from freshwater fishes.

Publication Date

Mon Jan 01 2018

Journal Name

International Journal Of Science And Research (ijsr)

The Linear Delay Fourth Order Eigen-Value Problems Solved By the Collocation Method

Ahmed E. Abdul-Nabi

Eman. A.

Sinan H.

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Publication Date

Sun May 26 2019

Journal Name

Iraqi Journal Of Science

Bayesian Estimation for Two Parameters of Gamma Distribution under Generalized Weighted Loss Function

Loaiy F.

Huda A.

...Show More Authors

This paper deals with, Bayesian estimation of the parameters of Gamma distribution under Generalized Weighted loss function, based on Gamma and Exponential priors for the shape and scale parameters, respectively. Moment, Maximum likelihood estimators and Lindleyâ€™s approximation have been used effectively in Bayesian estimation. Based on Monte Carlo simulation method, those estimators are compared in terms of the mean squared errors (MSEâ€™s).

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