航天推进技术研究院主办
[1]田亮,韩旭,袁稼辀,等.可调汽蚀文氏管调节精度影响因素的动态仿真[J].火箭推进,2024,50(03):65-74.[doi:10.3969/j.issn.1672-9374.2024.03.007]
TIAN Liang,HAN Xu,YUAN Jianzhou,et al.Dynamic simulation of factors affecting the adjustment accuracy for adjustable cavitation venturi[J].Journal of Rocket Propulsion,2024,50(03):65-74.[doi:10.3969/j.issn.1672-9374.2024.03.007]
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TIAN Liang,HAN Xu,YUAN Jianzhou,et al.Dynamic simulation of factors affecting the adjustment accuracy for adjustable cavitation venturi[J].Journal of Rocket Propulsion,2024,50(03):65-74.[doi:10.3969/j.issn.1672-9374.2024.03.007]
可调汽蚀文氏管调节精度影响因素的动态仿真
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
50
期数:
2024年03期
页码:
65-74
栏目:
目次
出版日期:
2024-06-25
- Title:
- Dynamic simulation of factors affecting the adjustment accuracy for adjustable cavitation venturi
- 文章编号:
- 1672-9374(2024)03-0065-10
- Keywords:
- adjustable cavitation Venturi; adjustment accuracy; numerical simulation; dynamic grid; adjusting cone eccentricity; reverse motion
- 分类号:
- V432
- 文献标志码:
- A
- 摘要:
- 面向工程应用研究了可调汽蚀文氏管调节精度的影响因素,采用FLUENT中的Schnerr-Sauer混合流体空穴模型,对设计的可调汽蚀文氏管流量线性度、内部流动特性进行了动态条件下的数值模拟,并研究了偏心和反向运动对调节精度的影响。结果表明:可调汽蚀文氏管由于调节锥初始运动阶段并未进入喉部,导致汽蚀段长度增加从而降低精度; 流量线性度在运动初期受节流面影响而降低,百分比流量在12%～70%范围内线性度最好,精度最高; 流量变化速率对汽蚀文氏管调节精度影响在5%以内; 调节锥偏心0.02 mm和0.05 mm时对汽蚀区长度调节精度影响在20%以内,而0.10 mm偏心时提高至40%,此时渐扩段汽蚀区产生偏移,压力分布不均,上侧增大而下侧降低,从而导致压力振荡; 不同偏心值对喉部流量调节精度影响均在4%以内; 调节锥反向运动会由于初始汽蚀段长度过短导致汽蚀特性减弱,汽蚀区变化速率减缓,流量调节精度影响在3%以内。
- Abstract:
- The factors affecting the adjustment accuracy of the tunable cavitation Venturi are studied for engineering application. The flow linearity and internal flow characteristics of the designed tunable cavitation Venturi are simulated by using the Schnerr-Sauer mixed fluid hole model in FLUENT under dynamic conditions. The influence of eccentric-reverse motion on the adjustment accuracy is also studied. The results show that the length of the cavitation section increases and the precision decreases because the initial movement of the adjustable cavitation cone does not enter the throat. The linearity of flow decreases at the initial stage due to the influence of throttling surface, and the linearity is the best and the accuracy is the highest within the range of 12% to 70% of percentage flow. The influence of flow rate on the accuracy of cavitation Venturi is less than 5%. When the eccentricity of the adjusting cone is 0.02 mm and 0.05 mm, the accuracy of adjusting the length of the cavitation zone is less than 20%, but it is increased to 40% when the eccentricity is 0.10 mm. At this time, the cavitation zone in the gradually expanding section will shift, and the pressure distribution is uneven, and the upper side increases while the lower side decreases, resulting in pressure oscillation. The influence of different eccentricity values on the accuracy of throat flow regulation is less than 4%. Because the initial cavitation section length is too short, the cavitation characteristics are weakened, the change rate of the cavitation zone is slowed down, and the accuracy of flow regulation is less than 3%.
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备注/Memo
收稿日期:2024- 01- 05修回日期:2024- 03- 11
作者简介:田亮(1983—),男,博士,副教授,研究领域为超声速燃烧及地面试验技术。
引用格式:田亮,韩旭,袁稼辀,等.可调汽蚀文氏管调节精度影响因素的动态仿真[J].火箭推进,2024,50(3):65-74.
更新日期/Last Update:
1900-01-01