Article(id=1153824230971003177, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1153813374610690435, articleNumber=null, orderNo=null, doi=10.3969/j.issn.2095-1469.2024.04.15, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1704124800000, receivedDateStr=2024-01-02, revisedDate=1710259200000, revisedDateStr=2024-03-13, acceptedDate=null, acceptedDateStr=null, onlineDate=1753022733681, onlineDateStr=2025-07-20, pubDate=null, pubDateStr=null, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753022733681, onlineIssueDateStr=2025-07-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753022733681, creator=13701087609, updateTime=1753022733681, updator=13701087609, issue=Issue{id=1153813374610690435, tenantId=1146029695717560320, journalId=1152916057816748034, year='2024', volume='14', issue='4', pageStart='553', pageEnd='744', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=0, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1753020145323, creator=13701087609, updateTime=1757481646291, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1172526266059206864, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1153813374610690435, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1172526266059206865, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1153813374610690435, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=715, endPage=722, ext={EN=ArticleExt(id=1153824231461736746, articleId=1153824230971003177, tenantId=1146029695717560320, journalId=1152916057816748034, language=EN, title=The Influence of Structural Parameters on Ejector Performance, columnId=1153813375445356933, journalTitle=Chinese Journal of Automotive Engineering, columnName=Technology and Research, runingTitle=null, highlight=null, articleAbstract=
Focusing on the hydrogen ejector used in fuel cells, a CFD simulation model was established to study the influence of structural parameters, such as the nozzle throat diameter D, the nozzle angle ø and the mixing chamber diameter D, on the ejector's performance. The results show that the influence of structural parameters on the ejector's performance varies across different power levels of the fuel cell stack. In the lowpower range, the entrainment ratio significantly increases with the nozzle angle, while in the highpower range, the entrainment ratio decreases as the nozzle angle increases. The influence of the mixing chamber diameter on the ejector's performance is opposite. In the lowpower range, the entrainment ratio decreases as the mixing chamber diameter increases, while in the highpower range, the entrainment ratio increases with the mixing chamber diameter. Based on the influence patterns, the design method for key structural parameters of the ejector was developed, and the optimal parameter range was obtained.
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以燃料电池用氢气引射器为研究对象,通过建立引射器內部流场CFD仿真模型,研究了喷嘴直径D、喷嘴角度@和混合室直径D等结构参数对引射器性能的影响规律。结果表明,在不同功率段,结构参数对引射器性能的影响规律不同。在低功率段,引射比随着喷嘴角度的增大而显著增大,在高功率段,引射比随着喷嘴角度的增大而减小。混合室直径D对引射性能的影响则相反,在低功率段,引射比随着混合室直径的增大而减小,在高功率段,引射比随着混合室直径的增大而增大。基于上述影响规律,形成了引射器关键参数设计选取方法,并给出了参数优化设计区间。
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| 工况 | 功率/kW | 一次流质 量流量 | 需求 计量比 | 水蒸气体 积分数/% | 氮气体积 分数/% |
| 1 | 7.10 | 0.09 | 3.00 | 6 | 4 |
| 2 | 19.30 | 0.26 | 2.00 | 6 | 4 |
| 3 | 37.10 | 0.52 | 1.50 | 6 | 4 |
| 4 | 53.00 | 0.78 | 1.50 | 6 | 4 |
| 5 | 61.70 | 0.96 | 1.50 | 6 | 4 |
| 6 | 69.10 | 1.13 | 1.50 | 6 | 4 |
| 7 | 76.40 | 1.31 | 1.50 | 6 | 4 |
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引射器工作条件, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 功率/kW | 一次流质 量流量 | 需求 计量比 | 水蒸气体 积分数/% | 氮气体积 分数/% |
| 1 | 7.10 | 0.09 | 3.00 | 6 | 4 |
| 2 | 19.30 | 0.26 | 2.00 | 6 | 4 |
| 3 | 37.10 | 0.52 | 1.50 | 6 | 4 |
| 4 | 53.00 | 0.78 | 1.50 | 6 | 4 |
| 5 | 61.70 | 0.96 | 1.50 | 6 | 4 |
| 6 | 69.10 | 1.13 | 1.50 | 6 | 4 |
| 7 | 76.40 | 1.31 | 1.50 | 6 | 4 |
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| 参数 | 值 |
| 一次流入口质量流量/( $\mathrm{g}/\mathrm{s}$ ) | 0.09 ~1.31 |
| 一次流入口温度 ${/}^{ \circ }\mathrm{C}$ | 50 |
| 二次流入口压力/ $\left\lbrack {\mathrm{{kPa}}\left( \mathrm{A}\right) }\right\rbrack$ | 168.90~232.30 |
| 二次流入口温度 ${}^{1}{}^{ \circ }\mathrm{C}$ | 53~71 |
| 引射器出口压力/ $\left\lbrack {\mathrm{{kPa}}\left( \mathrm{A}\right) }\right\rbrack$ | 170~250 |
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边界条件参数设置, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 值 |
| 一次流入口质量流量/( $\mathrm{g}/\mathrm{s}$ ) | 0.09 ~1.31 |
| 一次流入口温度 ${/}^{ \circ }\mathrm{C}$ | 50 |
| 二次流入口压力/ $\left\lbrack {\mathrm{{kPa}}\left( \mathrm{A}\right) }\right\rbrack$ | 168.90~232.30 |
| 二次流入口温度 ${}^{1}{}^{ \circ }\mathrm{C}$ | 53~71 |
| 引射器出口压力/ $\left\lbrack {\mathrm{{kPa}}\left( \mathrm{A}\right) }\right\rbrack$ | 170~250 |
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| 工况 | 试验测试(试验介质:氢气) | CFD 仿真 | 相对 误差/ % |
| 一次流 人口实 际流量/ (NL/ min) | 一次流入 口实际压 力/kPa (A) | 一次 流入 口温 度/℃ | 二次流 人口实 际流 量/ (NL/ min) | 引射器 出口实 际压力/ | 二次流 人口实 测压 力/kPa (A) | 二次 流入 口实 际温 度/℃ | 二次 流入 口相 对湿 度/% | 氮气 含量/ % | 引射 器实 际压 升/kPa | 引射 比(试 验) | 一次 流入 口流 量/ (g/s) | 二次 流流 量/ | 一次流 流量/ (NL/ min) | 二次流 流量/ (NL/ min) | 引射 比(仿 真) |
| 1 | 235.80 | 465.70 | 25 | 212 | 126.50 | 116.30 | 65.60 | 95.50 | 0 | 10.20 | 0.90 | 0.35 | 0.82 | 236.00 | 213.90 | 0.91 | 0.90 |
| 2 | 283.60 | 575.60 | 25 | 148 | 131.60 | 104.00 | 65.90 | 94.60 | 0 | 27.60 | 0.52 | 0.42 | 0.59 | 283.10 | 154.70 | 0.55 | 4.50 |
| 3 | 330.00 | 689.40 | 25 | 170 | 137.40 | 107.50 | 65.60 | 95.30 | 0 | 29.90 | 0.52 | 0.49 | 0.67 | 330.30 | 173.70 | 0.53 | 2.20 |
| 4 | 377.00 | 801.60 | 25 | 196 | 141.60 | 110.90 | 65.70 | 95.30 | 0 | 30.70 | 0.52 | 0.56 | 0.73 | 377.50 | 190.40 | 0.50 | -2.80 |
| 5 | 425.20 | 919.60 | 25 | 221 | 146.70 | 115.40 | 65.90 | 95.00 | 0 | 31.30 | 0.52 | 0.63 | 0.82 | 424.70 | 213.90 | 0.50 | -3.20 |
| 6 | 471.80 | 1028.10 | 25 | 245 | 152.10 | 120.30 | 65.10 | 94.80 | 0 | 31.80 | 0.52 | 0.70 | 0.90 | 471.90 | 234.80 | 0.50 | -4.20 |
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引射器试验数据与仿真数据对比, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 试验测试(试验介质:氢气) | CFD 仿真 | 相对 误差/ % |
| 一次流 人口实 际流量/ (NL/ min) | 一次流入 口实际压 力/kPa (A) | 一次 流入 口温 度/℃ | 二次流 人口实 际流 量/ (NL/ min) | 引射器 出口实 际压力/ | 二次流 人口实 测压 力/kPa (A) | 二次 流入 口实 际温 度/℃ | 二次 流入 口相 对湿 度/% | 氮气 含量/ % | 引射 器实 际压 升/kPa | 引射 比(试 验) | 一次 流入 口流 量/ (g/s) | 二次 流流 量/ | 一次流 流量/ (NL/ min) | 二次流 流量/ (NL/ min) | 引射 比(仿 真) |
| 1 | 235.80 | 465.70 | 25 | 212 | 126.50 | 116.30 | 65.60 | 95.50 | 0 | 10.20 | 0.90 | 0.35 | 0.82 | 236.00 | 213.90 | 0.91 | 0.90 |
| 2 | 283.60 | 575.60 | 25 | 148 | 131.60 | 104.00 | 65.90 | 94.60 | 0 | 27.60 | 0.52 | 0.42 | 0.59 | 283.10 | 154.70 | 0.55 | 4.50 |
| 3 | 330.00 | 689.40 | 25 | 170 | 137.40 | 107.50 | 65.60 | 95.30 | 0 | 29.90 | 0.52 | 0.49 | 0.67 | 330.30 | 173.70 | 0.53 | 2.20 |
| 4 | 377.00 | 801.60 | 25 | 196 | 141.60 | 110.90 | 65.70 | 95.30 | 0 | 30.70 | 0.52 | 0.56 | 0.73 | 377.50 | 190.40 | 0.50 | -2.80 |
| 5 | 425.20 | 919.60 | 25 | 221 | 146.70 | 115.40 | 65.90 | 95.00 | 0 | 31.30 | 0.52 | 0.63 | 0.82 | 424.70 | 213.90 | 0.50 | -3.20 |
| 6 | 471.80 | 1028.10 | 25 | 245 | 152.10 | 120.30 | 65.10 | 94.80 | 0 | 31.80 | 0.52 | 0.70 | 0.90 | 471.90 | 234.80 | 0.50 | -4.20 |
), ArticleFig(id=1153824288252613377, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1153824230971003177, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 组合类型 | | | |
| 以 ${D}_{\mathrm{t}}$ 为变量 | 1.60、1.70、 1.80 | 60 | 3.25 |
| 以 $\varphi$ 为变量 | 1.60 | 60、50、40 30、15、7 | 3.25 |
| 以 $D/{D}_{\mathrm{t}}$ 为变量 | 1.60 | 60 | 3.25、3.63、 3.81、4.00、 4.38 |
), ArticleFig(id=1153824288311333635, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1153824230971003177, language=CN, label=表 4, caption=
引射器结构参数组合, figureFileSmall=null, figureFileBig=null, tableContent=
| 组合类型 | | | |
| 以 ${D}_{\mathrm{t}}$ 为变量 | 1.60、1.70、 1.80 | 60 | 3.25 |
| 以 $\varphi$ 为变量 | 1.60 | 60、50、40 30、15、7 | 3.25 |
| 以 $D/{D}_{\mathrm{t}}$ 为变量 | 1.60 | 60 | 3.25、3.63、 3.81、4.00、 4.38 |
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