为有效降低普通弯头的冲蚀磨损速率，延长其使用寿命。提出一种胃型弯头，基于气固两相流理论，利用Fluent软件对胃型弯头进行数值模拟并分析流体冲蚀特性。分析结果表明：第二圆形截面位置小于7.5°、大于25.0°小于40.0°时的胃型弯头具有抗冲蚀作用，其中第二圆形截面位置35.0°时的胃型弯头抗冲蚀效果最好，同普通弯头相比抗冲蚀性能提高9.88%。流速由8 m/s增大至28 m/s，35.0°、37.5°、30.0°、32.5°时的胃型弯头和普通弯头的最大冲蚀速率平均增长26.08倍；颗粒直径由45 mm增大至120 mm，最大冲蚀速率最大增长1.71倍；质量流量由0.02 kg/s增加至0.12 kg/s，最大冲蚀速率最大增长7.35倍。不论流速、颗粒直径、质量流量为何值，35.0°、37.5°、30.0°、32.5°时的胃型弯头最大冲蚀速率始终小于普通弯头最大冲蚀速率，即均具有抗冲蚀作用，其中35.0°时的胃型弯头整体上抗冲蚀效果最好。该弯头可以有效减小冲蚀磨损速率，延长管道使用寿命，同时也可为弯头的抗冲蚀结构设计与优化提供新的设计方案。

In order to effectively reduce the erosion and wear rate of ordinary elbows and extend their service life. A stomach-type elbow was proposed, based on the theory of gas-solid two-phase flow, the Fluent software was used on the stomach-type elbow to numerically simulate and analyze fluid erosion characteristics. The analysis results show that the second circular cross-section position less than 7.5°, greater than 25.0° less than 40.0° of the gastric bend has an erosion-resistant effect, in which the second circular cross-section position of 35.0° of the gastric bend erosion-resistant effect is the best, compared with the ordinary elbow erosion-resistant performance increase by 9.88%. The flow rate increases from 8 m/s to 28 m/s, and the maximum erosion rate of the gastric bend and ordinary elbow at 35.0°, 37.5°, 30.0° and 32.5° increases by 26.08 times on average. The particle diameter increases from 45 mm to 120 mm, and the maximum erosion rate increases by 1.71 times. The mass flow rate increases from 0.02 kg/s to 0.12 kg/s, and the maximum erosion rate increases by 7.35 times. Mass flow rate increases from 0.02 kg/s to 0.12 kg/s, the maximum erosion rate increases by 7.35 times. Regardless of the flow rate, particle diameter, mass flow rate, 35.0°, 37.5°, 30.0°, 32.5° of the maximum erosion rate of the gastric bend is always less than the maximum erosion rate of the ordinary elbow, that is, all have the effect of anti-erosion, of which 35.0° of the gastric bend on the whole has the best anti-erosion effect. The elbow can effectively reduce the rate of erosion and wear to extend the service life of the pipeline, but also for the elbow of the anti-erosion structure design and optimization to provide a new design scheme.