A set of aerodynamic characteristics of norway spruce (Picea Arbies L.) seeds

Paweł Tylek , Zdzisław Kaliniewicz , Tomasz Zagrobelny


The seed separation is one of the methods to increase the sowing value of seeds. Frequently, due to numerous advantages, the differences in aerodynamic characteristics are used in seed separation. A set of aerodynamic characteristics includes the critical velocity coefficient of resistance, and coefficient of flying. Knowledge is also required of the construction components (filters, pneumatic channels, etc.) of machinery and devices for seed material purification as well as efficient use of cleaners and mechanical sorting machines and other machines for seed treatment. The results of measurements of these parameters for seeds of Norway spruce (Picea abies L.) are presented in this paper. The determination of some characteristics called modifications of known and yet in perfect methods of measurement, and sometimes even designing original measuring stations. In the event of using filming methods that task necessitated developing algorithms for computerised image processing. The division of seeds into two classes, depending on the degree of embryo development (determined by the X-ray method) was taken into account. Measurements of critical velocity were carried out in the vertical aerodynamic tunnel of variable internal area, equipped with a tunnel thermo-anemometer, and cooperating with a video-computer set. In order to calculate the aerodynamic coefficients it was necessary to determine additional physical properties of seeds, i.e. mass and lifting surfaces. The results are presented in the form of tables and histograms. Before undertaking the pneumatic separation, it is necessary to do the size calibration which would standardize the lifting surfaces. Having this done, the separation of individual even seed batches is carried out, and proper fractions are joined.
Author Paweł Tylek (FoF / IoFUaTF)
Paweł Tylek,,
- Institute of Forest Utilization and Technology Forest
, Zdzisław Kaliniewicz
Zdzisław Kaliniewicz,,
, Tomasz Zagrobelny (FoF / IoFUaFT)
Tomasz Zagrobelny,,
- Institute of Forest Utilization and Forest Technology
Publication size in sheets0.5
Book Walczykova Maria, Walczyk Józef, Więsik Jerzy, Tylek Paweł (eds.), Słowiński Krzysztof, Tylek Paweł, Kalinkiewicz Zdzisław, Kormanek Mariusz, Mateusiak Łukasz, Zagrobelny Tomasz, Walczyk Józef, Wojtkowiak Roman, Mordas Damian, Wiśniewski Marian, Ratajczak Wojciech, Zembrowski Krzysztof, Dubowski Adam, Gołąb Janusz, Hnilica Richard, Dado Miroslav, Messingerova Valeria, Stanovsky Miroslav, Jankovsky Martin, Ferencik Michal, Banach Jacek, Kucera Marian, Schurger Jan, Adamovskyy Mykola, Kyy Volodmyr, Kyy Andriy, Mahura Bohdan, Dvořák Jiří , Natov Pavel, Kovač Jan, Allman Michal, Mikleš Milan, Mikleš Juraj, Różański Henryk, Jabłoński Krzysztof, Slugen Jozef, Stempski Włodzimierz, Wojtkowiak Roman, Pilarek Zenon, Krilek Jozef, Owoc Danuta, Podlewski Łukasz, Styranivsky Oleg, Bakay Borys, Byblyuk Nestor, Shevchenko Natalija, Freydun Andrii, Dyachuk Maxym, Gejdos Milos, Suchomel Jozef, Walczykova Maria: Utilization of agricultural and forest machinery in research and teaching : monograph, Prace Komisji Nauk Rolniczych, Leśnych i Weterynaryjnych, vol. 4, no. 18, 2013, Polska Akademia Umiejętności, 362 p.
Keywords in Englishcritical velocity, distinguishing features, seed sorting
Internal identifierWL/16/28
Languageen angielski
Score (nominal)5
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