海洋产品冷保存用cfd低温双压力旋流雾化器的设计

IF 1.8 Q3 MECHANICS Fluids Pub Date : 2023-10-01 DOI:10.3390/fluids8100271
Eduardo Ayala, Diego Rivera, Julio Ronceros, Nikolai Vinces, Gustavo Ronceros
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引用次数: 0

摘要

下面的文章提出了一种双离心雾化器的设计,它允许两种流体(水和液氮)的喷雾相互作用。液氮(LN2)低于- 195.8°C,这个温度足够低,当氮气与雾化水接触时,会引起热损失并使其达到冰点。目的是将喷雾中的水滴转化为冰。冰粒落下来后,可以分散,覆盖尽可能大的区域用于冷藏的海产品。所有这些与两种流体相互作用和热交换有关的现象都是由于双离心雾化器,它将两个离心雾化器放在同心位置,导致两个喷雾不可避免地发生碰撞。每个雾化器都将使用数学模型和cfd工具进行设计。后者可以更好地研究双离心雾化器内外流体的流动特性。因此,我们的目标是通过与数值模拟数据的比较来确认数学模型的有效性。这种比较建立了很强的相关性(水雾化器的最大方差为1.94%,LN2雾化器的最大方差为10%),从而确保了雾化器的精确制造规格。需要强调的是,为了提高对双喷嘴内外流体的分辨率和理解能力,使用了两种类型的网格,以确保最佳选择的利用。同样,为了便于对得到的网格质量进行对比分析,上述网格的生成使用了两个不同的软件平台,即ANSYS mesh(四面体网格)和ANSYS ICEM(六面体网格)。这种理解有助于观察水与液氮相互作用时的温度,最终确保水滴在雾化器出口的冻结。这一目标与本研究的主要目标是无缝一致的,该研究围绕着通过冷技术保存海鲜产品。这种特殊的属性具有各种应用的潜力,包括食品的冷却过程。
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Design of a Cryogenic Duplex Pressure-Swirl Atomizer through CFDs for the Cold Conservation of Marine Products
The following article proposes the design of a bi-centrifugal atomizer that allows the interaction of sprays from two fluids (water and liquid nitrogen). The liquid nitrogen (LN2) is below −195.8 °C, a temperature low enough for the nitrogen, upon contact with the atomized water, to cause heat loss and bring it to its freezing point. The objective is to convert the water droplets present in the spray into ice. Upon falling, the ice particles can be dispersed, covering the largest possible area of the seafood products intended for cold preservation. All these phenomena related to the interaction of two fluids and heat exchange are due to the bi-centrifugal atomizer, which positions the two centrifugal atomizers concentrically, resulting in the inevitable collision of the two sprays. Each of these atomizers will be designed using a mathematical model and CFDs tools. The latter will provide a better study of the flow behavior of both fluids inside and outside the bi-centrifugal atomizer. Hence, the objective revolves around confirming the validity of the mathematical model through a comparison with numerical simulation data. This comparison establishes a strong correlation (with a maximum variance of 1.94% for the water atomizer and 10% for the LN2 atomizer), thereby ensuring precise manufacturing specifications for the atomizers. It is important to highlight that, in order to achieve the enhanced resolution and comprehension of the fluid both inside and outside the duplex atomizer, two types of meshes were utilized, ensuring the utilization of the optimal option. Similarly, the aforementioned meshes were generated using two distinct software platforms, namely ANSYS Meshing (tetrahedral mesh) and ANSYS ICEM (hexahedral mesh), to facilitate a comparative analysis of the mesh quality obtained. This comprehension facilitated the observation of water temperature during its interaction with liquid nitrogen, ultimately ensuring the freezing of water droplets at the atomizer’s outlet. This objective aligns seamlessly with the primary goal of this study, which revolves around the preservation of seafood products through cold techniques. This particular attribute holds potential for various applications, including cooling processes for food products.
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来源期刊
Fluids
Fluids Engineering-Mechanical Engineering
CiteScore
3.40
自引率
10.50%
发文量
326
审稿时长
12 weeks
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