渐缩喷管在设计工况下工作（ p 2 = pb ），如果喷管进口截面参数及背压保持不变，那么将此喷管截掉一段，其出口流速和流量将按（）变化。 -题库考试答案搜索网

渐缩喷管在设计工况下工作（ p ₂ = p_b ），如果喷管进口截面参数及背压保持不变，那么将此喷管截掉一段，其出口流速和流量将按（）变化。

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2021-07-17 23:48

A、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="">流速减小，流量增加</span>
B、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="">流速、流量都减小</span>
C、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="">流速不变，流量增加</span>
D、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="">流速减小，流量不变</span>

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标签：能源与动力工程专升本热力发电厂 2020年第二学期期末考试

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渐缩喷管在设计工况下工作（ p 2 = pb ），如果喷管进口截面参数及背压保持不变，那么将此喷管截掉一段，其出口流速和流量将按（ ）变化。

渐缩喷管在设计工况下工作（ p ₂ = p_b ），如果喷管进口截面参数及背压保持不变，那么将此喷管截掉一段，其出口流速和流量将按（）变化。