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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Microjets of citrus fruit
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Microjets of citrus fruit

机译：APS-流体动力学APS部门第70届年会-活动-柑橘类水果的微型喷射

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The rupture of oil glands in the citrus exocarp is a common experience to the discerning citrus consumer. When peeled, oil cavities housed with the citrus exocarp often rupture outwardly in response to externally applied bending stresses. Bending of the peel compresses the soft material surrounding the glands, the albedo, increasing fluid pressure. Ultimately, the fluid pressure exceeds the failure strength of the outermost membrane, the flavedo. The ensuing high-velocity discharge of oil and exhaustive emptying of oil glands creates a novel method for jetting small quantities of the aromatic and volatile oil. We compare the jetting behavior across five citrus hybrids through high-speed videography and material testing of exocarps. The jetting oil undergoes an initial acceleration surpassing 5,000 gravities, reaching velocities in excess of 10 m/s. Film of citrus jets and mimicking jets in the lab reveal their high level of instability is caused by irregular and non-circular orifice geometry. Through material characterization and bending simulations, we rationalize the combination of material properties necessary to generate the internal gland pressures required for explosive dispersal.
机译：柑橘外果皮中的油腺破裂是敏锐的柑橘消费者的普遍经历。剥皮后，柑橘外果皮中的油腔通常会因外部施加的弯曲应力而向外破裂。果皮的弯曲会压缩腺体周围的软物质（反照率），从而增加流体压力。最终，流体压力超过了最外层的薄膜flavedo的破坏强度。随之而来的高速排油和排空油封创造了一种喷射少量芳香和挥发性油的新颖方法。我们通过高速摄像和外果皮材料测试，比较了五个柑橘类杂种的喷射行为。喷出的油经历了超过5,000重力的初始加速度，达到了超过10 m / s的速度。实验室中的柑桔喷射流和模拟喷射流的薄膜显示，其高度不稳定是由不规则和非圆形的孔口几何形状引起的。通过材料表征和弯曲模拟，我们使产生爆炸扩散所需的内部压盖压力所需的材料特性组合合理化。

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