Amer Najat Najmaldeen Kakahy
@uokirkuk.edu.iq
Head of Dep. of Mechanization & Agricultural Equipments/ College of Agriculture/Al- Hawija
University of Kirkuk/College of Agriculture/Al- Hawija/ Dep. of Mechanization & Agricultural Equipments
RESEARCH INTERESTS
Mechanization & Agricultural Equipments
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Kakei A. Ayad, Abdolbaqi Mohammed Khdher, Kamal Jalal Tawfeeq Albazzaz, Amer Najat Najmaldeen Kakahy, Ali Hussein Abdulkarim, and Jayantha Epaarachchi
International Information and Engineering Technology Association
In recent years, researchers have paid special attention to wall uniformity temperature and improvement in a micro-combustor (MC) for applications as thermos-photovoltaic (TPV) since they have a direct influence on feasibility and efficiency of the required conversion of energy. Numerous experimentation and numerical studies in the field of micro-combustion have been carried out and published in this respect. This study focuses on the flame and flow behaviour in an improved MC. Utilizing the famous approach of fluid dynamics being computational (CFD), the impact of geometrical flow parameters behaviour and temperature of wall is explored and measured. The generated model is being used to evaluate the effects of Hydrogen (H) mass flow rate (MFR) and H/air equivalency ratios on the flame pattern and outer temperature of wall of conventional and enhanced MCs. Moreover, the influence of various MC cross sections (CS), such as square, circular, and flat, on temperature of wall is examined. The findings reveal that when the MFR rises, the wall outside temperature rises as well. The MC with flat cross-sections (CSs) is found to be more effective in terms of power of emitter and efficiency of emitter.
A. N. N. Kakahy, W. F. A. Alshamary, and A. A. Kakei
IOP Publishing
An experiment was carried out at the Agricultural Research and Experiments Station in the Sayyada Region of the College of Agriculture - University of Kirkuk, in order to study the effect of forward tractor speed and depth of ploughing in some technical indicators and physical properties of soil in Loam soils in 2019. Two factors were studied, depths of ploughing (4.63 and 6.30 cm) and the practical speed of the tractor (1.72 and 2.86 km hour-1) and their effect on some of the studied technical indicators, including the practical and theoretical field capacity, the slide percentage, the percentage of porosity, the volume of disturbed soil, the soil particles with less than 5 cm in diameter (5 cm m-2) and practical productivity. The experiment was carried out using the factorial experiment method according to The Randomized Complete Block Design (RCBD) with three replicates. The second speed of the tractor and the second ploughing depth exceeded in achieving the highest rate in practical field capacity of (0.28 and 0.34 ha h-1) and theoretical field capacity (0.41 and 0.49 ha h-1), respectively, and in giving the highest volume of the disturbed soil that were (184.48 and 244.753 m3 h-1) and practical productivity (0.33 and 0.39 ha h-1), respectively. While the lowest rate was in the percentage of slide of the first speed and the depth of the first ploughing (7.56 And 6.31%), respectively.The interference between the second tractor speed and the second ploughing depth was superior in achieving the highest rate in the practical and theoretical field capacity of (0.35 and 0.50 ha h-2) and the highest volume of the disturbed soil and practical productivity reached (254.02 m3 h-2 and 0.40 ha. h-2), respectively. The interference between the tractor first speed and the first ploughing depth exceeded the achievement of the lowest rate in the percentage of slide (3.36%).
Amer N. N. Kakahy, Wael F. A. AL Shamary, and Ayad A. Kakei
IOP Publishing
Amer N. N. Kakahy and Wael F. A. Alshamary
IOP Publishing
A.N.N Kakahy, D. Ahmad, M.D. Akhir, and A. Hashemi
Rynnye Lyan Resources
Kakahy, A.N.N. Ahmad, D., Akhir, M.D. and Hashemi, A. Department of Horticulture, Faculty of Agriculture, University of Kirkuk, Kirkuk, Iraq. Department of Biological and Agricultural Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. Mechanization and Automation Research Center, MARDI, 43400 UPM Serdang, Selangor, Malaysia. Department of Horticulture. Faculty of Agriculture and Natural Resources, Persian Gulf University. Bushehr, Iran.
Amer N.N. Kakahy, D. Ahmad, M.D. Akhir, S. Sulaiman, and A. Ishak
Trans Tech Publications, Ltd.
Two different shapes of knives (L and Y-shaped) for the rotary slasher with 300 knife cutting angle at three cutting speeds (1830, 2066 and 2044 rpm) were used to indicate their effects on the power consumption for pulverizing sweet potato vine which passed through the sieve (< 28 mm2). The results indicated that all the treatments were significant at p 0.01 significance level for the power consumption on sweet potato vine pulverizing. The best result was recorded from L-shaped knife with a power consumption of 52.12 Watts for sweet potato vine pulverization. Meanwhile, the best result was for the mower speed at 1830 rpm with the lowest power consumption of 61.23 Watts. The best performance for interaction between knife shapes and the cutting speeds was achieved by the L-shaped knife at 1830 rpm with lowest power consumption of 50.23 Watts at p 0.01.
Amer N N Kakahy, D Ahmad, M D Akhir, S Sulaiman, and A Ishak
IOP Publishing
The effects of different mower speeds (2358, 2440 and 2553 rpm) and different knife angles (30?, 40? and 50?) on sweet potato vine pulverization were studied. The results indicated that all the treatments were significant at p < 0.05 and p < 0.01 significance level for the pulverized percentage of sweet potato vine. The 30? knife angle gave the best result with highest vine pulverized percentage of 54.60 %, and a mower speed of 2553 rpm had the finest vine pulverized percentage of 46.99 %. The best performance for interaction effect between knife angle and speed of mower was achieved by the 30? knife angle and a mower speed of 2440 rpm resulting in an average percentage of 61.27% of pulverized vine.
Amer N. N. Kakahy, D. Ahmad and A. Abdullahi
Amer N.N. Kakahy, D. Ahmad, MD. Akhir, S. Sulaiman, and A. Ishak
Trans Tech Publications, Ltd.
The effects of a rotary slasher with two different shapes of knives (L and Y-shaped) at three cutting speeds (1830, 2066 and 2044 rpm) were studied on percentage of pulverization of sweet potato vine passing through the sieve (< 28 mm2). The results showed that all the treatments were significant at p 0.05 and p 0.01 significance level. The best result was by Y-shaped knife with highest vine pulverized percentage of 82.76 % and a mower speed of 2440 rpm had the finest vine pulverized percentage of 90.48 %. The best performance for interaction effects between knife shapes and speeds of mower was achieved by the Y-shaped knife and a mower speed of 2440 rpm resulting in an average percentage of 92.62 % of pulverized vine.
Amer N. N. Kakahy, D. Ahmad, M. D. Akhir, S. Sulaiman, and A. Ishak
American Scientific Publishers
A study was conducted at the Malaysian Agricultural Research and Development Institute, MARDI, Serdang, Selangor, Malaysia, to investigate the effects of Vertical Mower with double sided knife at four different speeds of 2000, 2200, 2500 and 2700 rpm, with two grass moisture contents at 20.37% and 57.07% wet base (wb%) during grass chopping (pulverizing). The results obtained showed that all the treatments were significant at 99% significance level for the percentage of grass leave area and the percentage of length of stem. The best results obtained were at a mower speed of 2500 rpm and 20.37% of grass moisture content which resulted in average values of 81.03% for the percentage of the leave area and 82.08% for the percentage of the length of the stem.
Amer N.N. Kakahy, D. Ahmad, M.D. Akhir, Shamsuddin Sulaiman, and A. Ishak
Trans Tech Publications, Ltd.
A study was conducted to test the effects of three different speeds of 1830, 2066 and 2440 rpm of a mower knife with serrated edges and two different feeding angles of 45° and 90° on the pulverization of sweet potato vines. The results indicated that all the treatments were significant at 99% significance level for the pulverized percentage of sweet potato vines remaining on the sieve. The best result was for the 45° feeding angle with lowest vine pulverized percentage of 47.20%. The second speed of 2066 rpm had the finest vine pulverized percentage of 57.47%. The best performance for overlapping effect between feeding angle and speed of mower was achieved by the 45° feeding angle and a mower speed of 1830 rpm resulting in an average percentage of 44.45 % of pulverized vines.
Amer N N Kakahy, D Ahmad, M D Akhir, A Ishak, and S Sulaiman
IOP Publishing
In this study information on the development of combined sweet potato harvester is presented. The study focuses on the design, manufacture and choice of the best slasher for cutting and fragmentation of stems and leaves (vegetative portion) for the crop to facilitate the process of harvesting and extraction of tubers. A survey on various types and forms of cutters (mowers) and knives normally used for cutting vines and leaves was conducted and concluded that the vertical type and flail type mowers are the most effective in removing of the vegetative growth. In addition there is a need to design an integrated harvester, which combines both the cutting and digging in a single pass in order to reduce the time taken for harvesting, the fuel consumption and the number of machines used since this will give some economical advantages. In addition to the design requirements, it is recommended that number of tests should be conducted to select the suitable speed for the tractor, the velocity for cutters and the length of knives for both sides of the ridges to avoid damage to the tubers.