Assessment of physical and aerodynamic properties of corn kernel (<scp>KSC</scp> 704)

Chenarbon, Hossein Ahmadi; Movahhed, Sara

doi:10.1111/jfpe.13858

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…When the sample starts to slide down, the ruler is used to record the tilt angle. The coefficient of friction can be calculated by the formula given as follows 8 , 15 : where μ—the coefficient of friction, α —the tilt angle (°).…”

Section: Methodsmentioning

confidence: 99%

Engineering properties of Cassia tora L. seeds and meal as a function of moisture content

Peng

Fang

Xiang

et al. 2022

Sci Rep

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Engineering properties are of great importance for Cassia tora L. seeds in aspects of harvesting, handling mechanical design and product processing. The effect of moisture content (7, 10, 13, 16 and 19%) (wet basis) on the properties: physical (length, width, bulk and true density, porosity, thousand seeds mass, coefficient of static friction and angle of repose), mechanical (hardness, fragmentation energy and failure deformations), and thermal (specific heat, thermal conductivity and thermal diffusivity), were systematically studied. As the moisture contents increase from 7 to 19%, the length (L) increased from 4.52 to 5.87 mm, the thickness (T) from 2.51 to 3.21 mm and the width (W) from 2.36 to 3.02 mm, respectively. The bulk and true density of Cassia tora L. seeds decreased from 775.83 to 654.17 kg/m3 and from 1295.21 to 1154.72 kg/m3, respectively, with the moisture content raised from 7 to 19%. The thermal conductivity of Cassia tora L. seeds meal was found to be 0.068–0.098 W m−1 K−1, 0.078–0.112 W m−1 K−1, 0.089–0.125 W m−1 K−1, 0.098–0.136 W m−1 K−1, 0.108–0.148 W m−1 K−1, 0.119–0.159 W m−1 K−1, respectively, at 25 °C, 45 °C, 65 °C, 85 °C, 105 °C and 125 °C in moisture ranges of 7–19%. The thermal diffusivity was found to decrease from 5.21 × 10–8 to 4.53 × 10–8 m2/s, from 5.75 × 10–8 to 4.91 × 10–8 m2/s, from 6.11 × 10–8 to 5.17 × 10–8 m2/s, from 6.52 × 10–8 to 5.36 × 10–8 m2/s, from 7.17 × 10–8 to 5.77 × 10–8 m2/s, from 7.36 × 10–8 to 5.84 × 10–8 m2/s, respectively, at 25 °C, 45 °C, 65 °C, 85 °C, 105 °C and 125 °C in moisture ranges of 7–19%. The results suggested that physical properties exhibited linear relationships with moisture content using the regression model, while mechanical properties showed a second-order polynomial relationship with moisture content. Furthermore, significant variation existed in thermal properties because of differentiate moisture content and temperature. These data and rules are also useful for high efficiency machines design and mechanisms development.

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Section: Methodsmentioning

confidence: 99%

Engineering properties of Cassia tora L. seeds and meal as a function of moisture content

Peng

Fang

Xiang

et al. 2022

Sci Rep

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“…The mainstream "roller plucking" mainly pulls corn cobs off the plant through a number of pairs of relatively rotating plucking rollers. During the process, the highspeed rotating cob picking rollers are in direct contact with the cobs, which can easily lead to serious cob injuries, kernel drop, and high breakage rate [28]. Geng A, et al found that the impact force on the cobs in cob picking increases with the increase in cob diameter and the decrease in the gap of the cob picking rollers.…”

Section: Mechanical Breakagementioning

confidence: 99%

Factors, Harms, and Control of Corn Kernel Breakage: A Review

GuiXiang,

YaHao,

ChaoSai

et al. 2023

Ann Food Process Preserv

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Corn kernel breakage is an important cause of corn losses. Beginning at harvest, corn kernels are broken by collisions with farm machinery and equipment, drying induces increased kernel breakage susceptibility, and equipment transfers and grain loading generate collisions between corn kernels and with equipment, increasing the amount of broken kernels. Meanwhile, broken kernels increase the risk of insect damage, mold and mildew, as well as aggravate segregation during warehousing, which is detrimental to the safety and quality of corn storage. The causes of corn kernel breakage from harvest to storage are summarized, the water content is a key factor in the post-production quality and quantity of corn, the research results on kernel breakage in recent years are summarized, and suggestions are made for the research related to the reduction of corn kernel breakage rate.

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“…Thus, a certain range of airflow velocity is required to simultaneously satisfy both conditions. Terminal velocities are the most significant properties in aerodynamics, and the terminal velocity at which the particles are suspended stationarily in the vertical air stream can be determined by using different methods: the free-fall, vertical air tunnel, and elutriator methods [17][18][19][20][21][22][23][24][25][26][27][28]. In this work, the custom-made device illustrated in Figure 1 was used to measure the terminal velocity of the different outputs of the threshing system, and to provide the basic information for designing a cleaning device.…”

Section: Terminal Velocity Test-bed For Each Threshing Output Componentmentioning

confidence: 99%

Improving Cleaning Performance of Rice Combine Harvesters by DEM–CFD Coupling Technology

Ding

Liang

et al. 2022

Agriculture

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The cleaning device is an important part of combine harvesters, as its superior or inferior performance directly affects the performance of the combine harvester greatly. With an increasing rice yield, the current single-duct cleaning performance declines greatly, and causes a large grain sieve loss level and a direct grain loss for the farms. To optimize the existing single-duct cleaning device to meet the large feeding rate requirement, firstly, the terminal velocity of rice grain and MOG (material other than grain) for different varieties was experimentally measured by the custom-made device. The effects of the moisture content of rice grains and the length of short straws on terminal velocity were studied in detail. Then, the gas–solid two-phase flow theory was comprehensively applied by utilizing the discrete element method (DEM) and computational fluid dynamics (CFD) to study the working mechanism of the existing single-duct cleaning unit, and the cleaning performance was evaluated from the view of the motion law of the threshing output within the cleaning shoe. At last, a multi-duct cleaning device was put forward, and a field experiment was performed to assess the performance of the newly developed cleaning device. The results showed that the grain sieve losses ratio and grain impurity ratio improved dramatically, proving that structure optimization of the cleaning device was feasible.

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Assessment of physical and aerodynamic properties of corn kernel (KSC 704)

Cited by 4 publications

References 27 publications

Engineering properties of Cassia tora L. seeds and meal as a function of moisture content

Engineering properties of Cassia tora L. seeds and meal as a function of moisture content

Factors, Harms, and Control of Corn Kernel Breakage: A Review

Improving Cleaning Performance of Rice Combine Harvesters by DEM–CFD Coupling Technology

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