Numerical Clarification of Wavy Sand Erosion Phenomena generated by Interaction among Flow, Small Particle and Wall Surface

流、小颗粒与壁面相互作用产生的波状砂蚀现象的数值解释

• 批准号: 16560158
• 负责人: YAMAMOTO Makoto
• 金额: $ 1.98万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560158/
• 关键词: Fluid Engineering; Computational Fluid Dynamics; Sand Erosion; Multi-Physics; マルチフィジックス現象; 流体・粒子・壁面干渉; 90度ベンド; 数値シミュレーション

Sand erosion is a phenomenon where solid particles impinging to a wall cause serious mechanical damages to the wall surface. This phenomenon is a typical multi-physics problem where the flow field, particle trajectory and wall deformation interact with among others. It is well known that the performance and lifetime of various machines are severely degraded due to sand erosion. We have developed the numerical procedure for sand erosion phenomenon. To simulate the phenomenon, the turbulent flow, the particle trajectory and the amount of erosion on the eroded wall were calculated repeatedly. The Neilson-Gilchrist model was used to estimate the weight loss due to sand erosion.In 2004, we extended this code to a three-dimensional computation, and it was applied to the 90-degree bend. The main objective was to clarify the reason why the wavy erosion pattern is formed over the curved wall. 9 cases with different particle diameters and wall curvatures were computed. The materials for the wall … More and the particle were adopted as aluminum and silicon carbide, respectively. It was found that (1)once a particle hits against a wall, an erosion cavity is generates on the wal,. (2)the erosion cavity mainly grows in the streamwise direction, (3)the spanwise growth of the erosion cavity is dominated by the longitudinal vertical motion over the curved wall, and (4)the above described phenomena produces the wavy erosion pattern over the curved wall.In 2005, I tried to clarify the mechanism of wavy sand erosion in a compressor blade passages. First, the code was extended to the rotational frame of reference. About 3 million grid points were used in all computations. It was confirmed that (A)sand erosion severely occurs around the leading edge and the tip of the rotor pressure side, (B)erosion does not appear remarkably in the stator because of the less kinetic energy, (C)in the rotor passage the centrifugal force makes the particles go toward the tip, and (D)particles are accelerated in the stator and thus sand erosion would take place again in the downstream stages. However, since wavy erosion pattern has not clearly reproduced, further investigations will be needed. Less

沙蚀是固体颗粒撞击壁面对壁面造成严重机械损伤的现象，众所周知，这种现象是流场、颗粒轨迹和壁面变形相互作用的典型多物理问题。由于沙蚀，各种机器的性能和寿命都会严重下降。为了模拟这种现象，我们反复计算了湍流、颗粒轨迹和侵蚀壁上的侵蚀量。 。这Neilson-Gilchrist 模型用于估计沙蚀引起的重量损失。2004 年，我们将此代码扩展到三维计算，并将其应用于 90 度弯道，主要目的是阐明原因。对9种不同颗粒直径和壁曲率的情况进行了计算，发现壁的材料分别为铝和碳化硅。 (1)颗粒一旦撞击壁面，壁面上就会产生侵蚀空洞，(2)侵蚀空洞主要沿流向生长，(3)侵蚀空洞的展向生长以纵向垂直为主。弯曲壁上的运动，以及（4）上述现象在弯曲壁上产生波状侵蚀模式。2005年，我试图阐明压缩机叶片通道中波状沙蚀的机理，首先，代码被扩展到。这所有计算中使用了大约300万个网格点，证实了（A）前缘和转子压力侧尖端周围发生了严重的沙蚀，（B）侵蚀并不稀疏。由于动能较小，(C)在转子通道中，离心力使颗粒流向尖端，(D)颗粒在定子中加速，因此在下游阶段会再次发生砂蚀。 ， 自从波状侵蚀模式尚未清晰再现，需要进一步调查。

项目成果

Numerical Investigation on Wavy Streak Formation due to Sand Erosion

沙蚀引起的波状条纹形成的数值研究

• 发表时间: 2005
• 期刊: Proc. 10^th Symposium of Gas Particle Flows
• 作者: M.Suzuki;K.Toda;M.Yamamoto
• 通讯作者: M.Yamamoto

Multi-Physics Simulation of Sand-Erosion Phenomenea on Turbine Blade

涡轮叶片沙蚀现象的多物理场模拟

• 发表时间: 2005
• 期刊: Computational Fluid and Solid Mechanics 2005
• 作者: M.Suzuki;K.Toda;M.Yamamoto
• 通讯作者: M.Yamamoto

Modelling of Three-Phase Flow in Electro-Chemical Machining

电化学加工中的三相流建模

• 发表时间: 2005
• 期刊: Proc. Cavitation and Multiphase Flow Forum
• 作者: R.Tsuboi;K.Toda;M.Yamamoto;R.Nohara;D.Kato
• 通讯作者: D.Kato

Numerical Simulation of Ice Accretion on Wind Turbine Blade

风力发电机叶片积冰的数值模拟

• 发表时间: 2004
• 期刊: Proc.6^<th> World Congress on Computational Mechanics
• 作者: Y.Imamura;K.Toda;M.Yamamoto
• 通讯作者: M.Yamamoto

Numerical Simulation of Hydrocarbon Fuels PDEs by a Detailed Reaction Model

通过详细反应模型对碳氢燃料偏微分方程进行数值模拟

• 发表时间: 2005
• 期刊: Proc.19^<th> Symposium on Computational Fluid Dynamics B1-4
• 作者: J.Kato;K.Inaba;M.Yamamoto
• 通讯作者: M.Yamamoto