基于临界流文丘里喷嘴阵列的流量标准装置及试验

赵佳锡; 张郅豪; 吴松岭; 覃晨; 章荣平

doi:10.13224/j.cnki.jasp.20240133

基于临界流文丘里喷嘴阵列的流量标准装置及试验

doi: 10.13224/j.cnki.jasp.20240133

赵佳锡^1,,
张郅豪²,
吴松岭¹,
覃晨¹,
章荣平^1,*, ,

1.
中国空气动力研究与发展中心气动噪声控制重点实验室，四川绵阳 621000
2.
西南科技大学信息工程学院，四川绵阳 621010

基金项目: 国家自然科学基金（52306056，12234015）

详细信息

作者简介:
赵佳锡（1993-），男，助理研究员，博士，主要从事气动噪声测量技术研究。E-mail：zhaojx0801@foxmail.com

通讯作者:
章荣平（1981-），男，研究员级高级工程师，硕士，主要从事低速风洞试验技术研究。E-mail：zhangrongping@cardc.cn

中图分类号: V211.72
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- 文章访问数: 497
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- 被引次数: 0
出版历程
- 收稿日期: 2024-03-08
- 网络出版日期: 2024-09-13

Flow calibration system test based on critical flow Venturi nozzle array

1.
Key Laboratory of Aerodynamic Noise Control，China Aerodynamics Research and Development Center，Mianyang Sichuan 621000，China
2.
School of Information Engineering，Southwest University of Science and Technology，Mianyang Sichuan 621010，China

摘要

摘要:
为提高动力模拟等风洞试验测量数据的精确度，现依托中国空气动力研究与发展中心的集中高压气源，采用标准表法原理，研制了基于临界流文丘里喷嘴阵列的次级流量标准装置，设计校准压力范围为1～6 MPa，流量范围为0.2～5.55 kg/s。标准装置由供气系统、标准临界流文丘里喷嘴阵列和测量采集系统等组成，其中，标准临界流文丘里喷嘴溯源至中国计量科学研究院的pVTt法流量标准装置。针对该装置，试验测量分析了供气系统稳定性、管道内温度场以及流出系数测量重复性等特性，并进行不确定度分析。试验结果表明，该标准装置的供气系统稳定性良好，管道内温度场分布的均匀性随着流量增加而提高，流出系数的测量重复性在0.04%以内，扩展不确定度（包含因子k=2）小于0.15%。
- 临界流文丘里喷嘴 /
- 流量标准装置 /
- 次级标准 /
- 温度场分布 /
- 流出系数
Abstract:
In order to improve the accuracy of wind tunnel test, a secondary flow standard device based on critical flow Venturi nozzle array was developed based on the high-pressure air source of China Aerodynamics Research and Development Center. The designed calibration pressure range was 1—6 MPa, and the flow range was 0.2—5.55 kg/s. The calibration device was composed of gas supply system, standard critical flow Venturi nozzle array and measurement system. The standard critical flow Venturi nozzles were traced to the pVTt method flow standard device of the National Institute of Metrology. The stability of the gas supply system, the temperature field inside the pipeline, and the repeatability of the discharge coefficient were experimentally studied. In addition, the uncertainty of the discharge coefficient was analyzed. The experimental results indicated that the gas supply system of the standard device had good stability. The uniformity of temperature distribution inside the pipeline increased with the increase of flow rate. The measurement repeatability of the discharge coefficient was within 0.04%, and the extended uncertainty (coverage factor k=2) was less than 0.15%.
- critical flow Venturi nozzle /
- flow standard device /
- secondary standard /
- temperature field distribution /
- discharge coefficient

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图 1 流量标准装置设计原理

Figure 1. Design principle of flow calibration facility

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图 2 高压供气系统工作原理

Figure 2. Working principle of high-pressure gas supply system

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图 3 基于CFVN阵列的流量标准装置机械结构

Figure 3. Mechanical structure of flow calibration device based on CFVN array

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图 4 标准CFVN阵列安装效果

Figure 4. Installation effect of standard CFVN array

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图 5 流量标准装置测量系统原理

Figure 5. Composition of measurement system for flow calibration device

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图 6 标准装置测量系统机柜

Figure 6. Measurement system for flow calibration device

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图 7 第二级管道温度传感器分布

Figure 7. Distribution of temperature sensors in the second section of the pipeline

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图 8 基于CFVN阵列的流量标准装置

Figure 8. Flow calibration device based on CFVN array

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图 9 标准CFVN阵列开启状态

Figure 9. Open state of the standard CFVN array

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图 10 滞止温度时域变化

Figure 10. Time domain curve of stagnation temperature

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图 11 滞止压力时域变化

Figure 11. Time domain curve of stagnation pressure

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图 12 供气系统质量流量时域变化

Figure 12. Time domain curve of mass flow rate

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图 13 温度空间分布（SN3-1）

Figure 13. Temperature spatial distribution （SN3-1）

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图 14 温度空间分布（SN5-1）

Figure 14. Temperature spatial distribution （SN5-1）

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图 15 温度空间分布（SN7）

Figure 15. Temperature spatial distribution （SN7）

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图 16 待校准CFVN平均流出系数

Figure 16. Average discharge coefficient of the CFVN to be calibrated

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表 1 CFVN （SN3-1）重复性试验结果

Table 1. Repeatability test results of CFVN （SN3-1）

待校准测点	序号	滞止压力/kPa	滞止温度/K	雷诺数/10⁶	流出系数	平均流出系数	重复性/%
测点1	1	952.123	296.1	0.898	0.9948	0.9948	0
	2	952.752	296.3	0.898	0.9948
	3	953.311	296.5	0.898	0.9948
测点2	1	2405.341	300.1	2.255	0.9961	0.9960	0.01
	2	2407.298	300.2	2.256	0.9960
	3	2409.437	300.3	2.257	0.9960
测点3	1	3559.468	301.2	3.340	0.9962	0.9961	0.01
	2	3563.502	301.5	3.341	0.9961
	3	3582.736	301.8	3.356	0.9961
测点4	1	4791.950	301.5	4.511	0.9958	0.9959	0.01
	2	4798.976	302.0	4.512	0.9960
	3	4800.695	302.2	4.510	0.9960
测点5	1	6023.920	301.2	5.702	0.9958	0.9959	0.01
	2	6023.684	301.2	5.701	0.9959
	3	6023.736	301.3	5.699	0.9960

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表 2 CFVN （SN5-1）重复性试验结果

Table 2. Repeatability test results of CFVN （SN5-1）

待校准测点	序号	滞止压力/kPa	滞止温度/K	雷诺数/10⁶	流出系数	平均流出系数	重复性/%
测点1	1	985.118	299.6	1.297	0.9947	0.9945	0.02
	2	982.257	299.7	1.293	0.9943
	3	982.733	299.9	1.293	0.9944
测点2	1	2407.270	301.7	3.168	0.9950	0.9950	0.01
	2	2413.566	302.3	3.171	0.9950
	3	2415.024	302.4	3.172	0.9949
测点3	1	3615.609	302.2	4.772	0.9951	0.9947	0.04
	2	3584.869	301.4	4.742	0.9948
	3	3598.241	301.3	4.761	0.9943
测点4	1	4750.445	301.4	6.310	0.9946	0.9947	0.01
	2	4781.773	302.2	6.338	0.9947
	3	4799.410	300.5	6.393	0.9947
测点5	1	6190.247	301.6	8.261	0.9948	0.9948	0.01
	2	6142.713	299.9	8.239	0.9947
	3	6041.973	301.2	8.067	0.9949

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表 3 CFVN （SN7）重复性试验结果

Table 3. Repeatability test results of CFVN （SN7）

待校准测点	序号	滞止压力/kPa	滞止温度/K	雷诺数/10⁶	流出系数	平均流出系数	重复性/%
测点1	1	879.316	301.2	1.627	0.9951	0.9952	0.02
	2	879.811	301.4	1.627	0.9952
	3	874.827	292.1	1.661	0.9954
测点2	1	2169.618	300.7	4.038	0.9955	0.9957	0.03
	2	2168.457	300.4	4.039	0.9956
	3	2123.148	291.3	4.061	0.9961
测点3	1	3236.867	299.9	6.063	0.9958	0.9959	0.02
	2	3234.389	299.7	6.062	0.9958
	3	3208.537	290.4	6.182	0.9962
测点4	1	4230.455	297.2	8.018	0.9958	0.9958	0
	2	4233.705	296.7	8.037	0.9958
	3	4205.526	290.6	8.132	0.9958
测点5	1	5410.576	293.2	10.428	0.9961	0.9961	0.01
	2	5413.694	292.7	10.451	0.9960
	3	5414.265	292.1	10.471	0.9961

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表 4 流出系数不确定度分析

Table 4. Analysis of discharge coefficient uncertainty

参数		SN3-1号	SN5-1号	SN7号
$ {\stackrel{-}{p}}_{0} $/kPa		3568.569	3599.573	3226.598
$N$		4	8	15
不确定度/%	${u_{\text{r}}} （ {{C_{{\text{d}},{\text{m}}}}} ） $	0.04	0.04	0.04
	${u_{\text{r}}} （ {{p_0}} ） $	0.01	0.04	0.01
	${u_{\text{r}}} （ {{p_1}} ） $	0.01	0.01	0.01
	${u_{\text{r}}} （ {{T_0}} ） $	0.01	0.01	0.01
	${u_{\text{r}}} （ {{T_1}} ） $	0.12	0.03	0.03
	$ {u_{\text{r}}}（{C_{\text{d}}}） $	0.01	0.02	0.02
	$ {u_{\text{r}}}（{C_{\text{d}}}） $	0.074	0.070	0.048

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