Aerodynamic Properties of Apricot Pits

Yıl 2016, , 47 - 55, 16.05.2016

Sefa Tarhan Saadettin Yıldırım

https://doi.org/10.13002/jafag904

Öz

Physical properties of agricultural materials are important for designing and manufacturing their harvest machines on farms and processing equipment in industry. Aerodynamic properties are related to their reaction to moving air as in piles or as a single seed/piece. The pressure drops occurring through apricot pit piles for the superficial air velocities ranging from 0.05 to 2.93 m3·m-2·s-1 were experimentally determined and mathematically modeled by using Modified Shedd’s equation and Hukill-Ives equation. These experiments were replicated three times. The results of curve fitting suggested that both equations could be used adequately to predict the pressure drop of apricot pit piles with a high goodness of fitting (R2>0.92). The terminal velocities of apricot pits, their kernels and hulls were experimentally determined by dropping one sample into upward air flow current inside the transparent cylindrical pipe. These experiments were replicated ten times. The terminal velocity values changed with the weight and projected area of these samples. The average terminal velocities of apricot pits, their kernels, and hulls were 10.99, 10.12, and 7.10 m·s-1, respectively. These results suggest that the apricot kernels can be cleaned easily from their hulls by pneumatic separation.

Anahtar Kelimeler

Apricot pit, air resistance, terminal velocity, superficial velocity

Kaynakça

• Agullo J O and Marenya M O (2005). Airflow Resistance of Parchment Arabica coffee. Biosysistem. Engineering, 91: 149–156.
• Altuntas E and Erkol M (2010). Physical Properties of Shelled and Kernel Walnuts as Affected by the Moisture Content. Czech Journal of. Food Science, 28: 547–556.
• Anoymous (2012). International Trade Center. Available: http://www.trademap.org. (Accessed to web: 20.04.2015).
• Aydın C (2003). Physical properties of almond nut and kernel. Journal of Food Engineering, 60: 315 320.
• Chung D S, Maghirang R G, Kim Y S, Kim M S (2001). Effects of moisture and fine material on static pressure drops in a bed of grain sorghum and rough rice. Transactions of the ASAE, 42: 331–336.
• Dairo O U and Ajibola O O (1994). Resistance to Airflow of Bulk Sesame Seed. Journal of Agricultural Engineering Research, 58: 99–105.
• FAO 2013. Statistical database. Available: http://www.fao.org. (Accessed to web: 10.03.2015).
• Gezer I, Haciseferogullari H and Demir F (2002). Some physical properties of Hacihaliloglu apricot pit and kernel. Journal of Food Engineering, 56: 49–57.
• Giner S A and Denisienia E (1996). Pressure drop through wheat as affected by air velocity, moisture content and fines. Journal of Agricultural Engineering Research, 63: 73–86.
• Gunasekaran S and Jackson C Y (1988). Resistance to airflow of grain sorghum.Transactions of ASAE, 31: 1237–1240.
• Gupta R K Arora G Sharma R (2007). Aerodynamic properties of sunflower seed (Helianthus annuus L.). Journal of Food Engineering, 79: 899-904.
• Hukill W V and Ives N C (1955). Radial airflow resistance of grains. Agricultural Engineering, 35: 332–335.
• Jayas D S, Sokhasanj S, Moysey E B, and Barber E M (1987). Airflow resistance of canola (rapeseed). Transactions of the ASAE, 30: 1484–1488.
• Kashaninejad M, Mortazavi A, Safekordi A, and Tabil L G, (2005). Some physical properties of pistachio (Pistachio vera L.) nut and its kernel. Journal of Food Engineering, 72: 30-38.
• Kashaninejad M and Tabil L G, (2009). Resistance of bulk pistachio nuts (Ohadi variety) to airflow. Journal of Food Engineering, 90: 104–109.
• Nalladurai K, Alagusundaram K, and Gayathri P, (2002). Airflow Resistance of Paddy and Its Byproducts. Biosysistem. Engineering, 83: 67-75.
• Nimkar P M, and Chattopadhyay P K, (2002). Airflow resistance of green gram. Biosystems Engineering 82: 407–414.
• Nimkar P M, Mandwe D S and Dudhe R M (2005). Physical properties of moth gram, Biosystems Engineering 91: 183–189.
• Omobuwajo T O, Akande E A and Sanni L A (1999). Selected physical, mechanical and aerodynamic properties of Africa breadfruit (Treculia africana) seeds. Journal of Food Engineering, 40: 241–244.
• Omobuwajo T O, Sanmi L A and Olajide J O (2000). Physical properties of ackee apple seeds. Journal of Food Engineering, 45: 43–48.
• Ozcan M (2000). Compostion of some apricot (Prunus armeniaca L.) kernels grown in Turkey. Acta Alimentaria, 29: 289–293.
• Ozdemir F and Akinci I (2004). Physical and nutritional properties of four major commercial Turkish hazelnut varieties. Journal of Food Engineering, 63: 341–347.
• Ozgüven F and Vursavus K (2005). Some physical, mechanical and aerodynamic properties of pine (Pinus pinea) nuts. Journal of Food Engineering, 68: 191–196.
• Patil B G and Ward G T (1988). Resistance to Airflow of Oilseed Rape. Journal of . Agricultural. Engineering. Research, 41: 25–31.
• Rajabipour A Shahbazi F, Tabatabaeefar A and Mohtasebi S (2001). Airflow Resistance in Walnuts. Journal of Agricultural. Science and. Technology, 3: 257-264.
• Sacilik K (2004). Resistance of bulk poppy seeds to airflow. Biosystems Engineering, 89: 435–443.
• Shedd C K (1953). Resistance of grains and seeds to airflow. Agricultural Engineering, 4: 616–619.
• Sokhansanj S A, Falacinski A A, Sosulski F W, Jayas D S and Tang, J.(1990). Resistance of bulk lentils to airflow. Transactions of the ASAE, 33: 1281–1285.