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储气库井口天然气计量影响特性研究 被引量:1
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作者 何金蓬 彭利果 +1 位作者 张明鑫 陈波 《石油与天然气化工》 CAS CSCD 北大核心 2022年第3期117-124,共8页
目的获得准确的储气库井口天然气计量影响特性,评价流量计在储气库井口计量的适应性,提高储气库井口天然气计量的准确度,以优化生产运行参数、提高天然气注采率。方法采用实验室与储气库现场相结合的实验手段,并基于大数据统计对比分析... 目的获得准确的储气库井口天然气计量影响特性,评价流量计在储气库井口计量的适应性,提高储气库井口天然气计量的准确度,以优化生产运行参数、提高天然气注采率。方法采用实验室与储气库现场相结合的实验手段,并基于大数据统计对比分析方法,建立储气库井口流量计计量性能评价方法,研究了5个流量计的计量影响特性。结果通过对比可知:①不同类型超声流量计在不同压力条件下计量特性不同,受超声流量计探头性能的影响,有的超声流量计经低压测试后,具备代表此流量计在一定高压范围的计量性能,但在远超过检定压力范围的情况下,其计量性能将发生变化;②差压流量计在不同压力条件下计量重复性较好。结论①靶式流量计对天然气中杂质要求较低,压损小,但误差高达40%,且故障率高;②针对相国寺储气库气质与现场工艺条件(主要是含水量少、凝析油少、节流阀无噪声干扰),经过天然气实流校准后,5个流量计的计量示值误差符合GB 50349-2015《气田集输设计规范》中“井口计量设施的允许偏差为±7.0%”的要求,J1槽道流量计、J2均速管流量计、J3超声流量计偏差满足±5%的偏差范围;③建议储气库井口流量计需经过天然气实流校准后使用,且运行工况流量应高于拐点流量,以保证现场注采气的计量准确性。 展开更多
关键词 储气库井口 高压天然气 实流比对 流量计特性
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大管径转炉煤气流量计量方案的探讨
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作者 马彦平 《中文科技期刊数据库(全文版)工程技术》 2021年第9期141-142,共2页
本文从生产实际出发,针对公司转炉煤气计量存在的大管径、小流量问题进行攻关;工程技术人员结合企业的实际运行情况、并与多家流量计厂家进行深入技术交流探讨,最终研究出解决大管径、小流量转炉煤气计量的方案,实现转炉煤气计量数据的... 本文从生产实际出发,针对公司转炉煤气计量存在的大管径、小流量问题进行攻关;工程技术人员结合企业的实际运行情况、并与多家流量计厂家进行深入技术交流探讨,最终研究出解决大管径、小流量转炉煤气计量的方案,实现转炉煤气计量数据的准确性、稳定性,为企业节能降耗、工艺管控提供坚实的基础。大管径转炉煤气流量计量方案在钢铁行业中具有较高的实用、推广价值。 展开更多
关键词 转炉煤气计量 实流比对 节能降耗
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Experimental Study on the Dam-Break Hydrographs at the Gate Location
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作者 LIU Hui LIU Haijiang +1 位作者 GUO Liheng LU Senxun 《Journal of Ocean University of China》 SCIE CAS CSCD 2017年第4期697-702,共6页
When studying the dam-break flow phenomenon,the basic hydrodynamic features of the dam-break flow at the gate location should be verified primarily.In this study,laboratory experiments were performed in a rectangular ... When studying the dam-break flow phenomenon,the basic hydrodynamic features of the dam-break flow at the gate location should be verified primarily.In this study,laboratory experiments were performed in a rectangular and horizontal flume with the same initial water head setting on the dry and wet downstream bed conditions.Water surface elevation was extracted through image analysis and validated by comparing with the data measured using a wave gauge.Temporal variation of the water surface elevation at the gate location,quantified in terms of high-speed video recorded images,can be divided into three stages,the sharp decreasing stage,the relatively steady stage,and the gradually decreasing stage.Applicability of several classic analytical solutions of the dam-break problem at the gate location was validated using present experimental data.Ritter's solution is effective for the dry bed condition while Stoker's solution could be applied to the wet bed case,and both are only applicable during the steady stage.Lin' solution reproduces the gate-site hydrographs well during both the relatively steady and the gradually decreasing stages,especially for the condition under which the down-upstream water depth ratio is smaller than 0.138. 展开更多
关键词 dam-break experiment HYDROGRAPH gate location image analysis three stages
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热式质量燃气表计量特性试验研究 被引量:1
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作者 邓立三 陈豫 +1 位作者 鹿凯 郑会丽 《煤气与热力》 2019年第10期10032-10037,10040,10046,共8页
介绍热式质量燃气表的流量传感器工作原理,进行了初始计量特性试验、比对实验和天然气实流耐久性试验,耐久性试验时间为4 000 h。研究结果表明:经过初始计量特性试验,得知6台热式质量燃气表全部合格。经过天然气实流耐久性试验,得知参... 介绍热式质量燃气表的流量传感器工作原理,进行了初始计量特性试验、比对实验和天然气实流耐久性试验,耐久性试验时间为4 000 h。研究结果表明:经过初始计量特性试验,得知6台热式质量燃气表全部合格。经过天然气实流耐久性试验,得知参与试验的3台热式质量燃气表4 000 h耐久性试验结果全部满意。经过仪表空气比对试验,得知参与试验的3台热式质量燃气表在不同检定装置的比对结果多数为满意,仅一台燃气表一个小流量点不满意。在天然气实流耐久性试验中进行仪表的天然气实流比对,3路试验管路中安装了4台热式质量燃气表,所有试验仪表均为1.5级,其最大允许相对误差为±1.5%,误差偏差(误差偏差定义为相对误差和相应流量点的初始相对误差的差值)为±3%。每台仪表与同一管路上几台表平均气量的相对误差均未超过误差偏差(±3%),说明各试验仪表之间偏差均较为稳定,且月度偏差呈现随机现象,没有出现持续性规律性变坏趋势,在现场比对中偏差属于可以接受范围。现场实流比对试验中,东区的普通膜式表受环境温度变化影响较大,但长期平均相对误差并不大,腰轮流量计平均相对误差为正值,为2.11%,两台超声波燃气表平均相对误差为负值,分别为-0.83%和-1.65%,热式质量燃气表平均相对误差为0.05%。这表明几种表型计量特性较为稳定。 展开更多
关键词 热式质量燃气表 计量特性 实流耐久性试验 实流比对
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Turbine Blade Boundary Layer Separation Suppression via Synthetic Jet: an Experimental and Numerical Study 被引量:1
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作者 Bernardini C. +9 位作者 Carnevale M. Manna M. Martelli F. Simoni D. Zunino P. 《Journal of Thermal Science》 SCIE EI CAS CSCD 2012年第5期404-412,共9页
The present paper focuses on the analysis of a synthetic jet device (with a zero net massflow rate) on a separated boundary layer. Separation has been obtained on a flat plate installed within a converging-diverging t... The present paper focuses on the analysis of a synthetic jet device (with a zero net massflow rate) on a separated boundary layer. Separation has been obtained on a flat plate installed within a converging-diverging test section specifically designed to attain a local velocity distribution typical of a high-lift LPT blade. Both experimental and numerical investigations have been carried out. Unsteady RANS results have been compared with experiments in terms of time-averaged velocity and turbulence intensity distributions. Two different Reynolds number cases have been investigated, namely Re = 200,000 and Re = 70,000, which characterize low-pressure turbine operating conditions during take-off/landing and cruise. A range of synthetic jet aerodynamic parameters (Strouhal number and blowing ratio) has been tested in order to analyze the features of control-separated boundary layer interaction for the aforementioned Reynolds numbers. 展开更多
关键词 Synthetic Jet Separated Flow Active Flow Control Unsteady Flow Ultra High Lift LPT.
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