沈飞粉体拉瓦尔喷�?参数-价格-中国粉体罐�/title>

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$(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p style="text-align: left;"><span style="text-align: left;"></span></p><p style="color: rgb(51, 51, 51); font-family: 宋体, "Arial Narrow", HELVETICA; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);"><span microsoft="" font-size:="" font-weight:="" background-color:=""><span microsoft="" font-size:="" background-color:="" style="color: rgb(136, 136, 136);">拉瓦尔喷管是火箭发动机和航空发动�?常用的构件，由两个锥形管构成，其中一个为收缩管，另一个为扩张管� 拉瓦尔喷管是推力室的重要组成部分。喷管的前半部是由大变小向中间收缩至一个窄喉。窄喉之后又由小变大向外扩张至箭底。箭体中的气体受高压流入喷咀的前半部，穿过窄喉后由后半部逸出、�/span></span></p><p style="color: rgb(51, 51, 51); font-family: 宋体, "Arial Narrow", HELVETICA; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);"><span microsoft="" font-size:="" font-weight:="" background-color:=""><span microsoft="" font-size:="" background-color:="" style="color: rgb(136, 136, 136);"><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/145118_354059_procont.jpg" title="161533_154994_procont.jpg" alt="111.jpg" style="border: 0px none; vertical-align: middle;"/></span></span></p><p style="color: rgb(51, 51, 51); font-family: 宋体, "Arial Narrow", HELVETICA; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255);"><span microsoft="" font-size:="" font-weight:="" background-color:=""><span microsoft="" font-size:="" background-color:="" style="color: rgb(136, 136, 136);"></span></span></p><p microsoft="" list-style:="" font-size:="" white-space:="" background-color:="" style="color: rgb(51, 51, 51); font-family: 宋体, "Arial Narrow", HELVETICA; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px;"><span microsoft="" style="box-sizing: border-box; margin: 0px; padding: 0px; list-style-type: none;">拉瓦尔喷管介绌�/span></p><p microsoft="" list-style:="" font-size:="" white-space:="" background-color:="" style="color: rgb(51, 51, 51); font-family: 宋体, "Arial Narrow", HELVETICA; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px;">拉瓦尔喷管是火箭发动机和航空发动�?常用的构件，由两个锥形管构成，其中一个为收缩管，另一个为扩张管� 拉瓦尔喷管是推力室的重要组成部分。喷管的前半部是由大变小向中间收缩至一个窄喉。窄喉之后又由小变大向外扩张至箭底。箭体中的气体受高压流入喷咀的前半部，穿过窄喉后由后半部逸出、�/p><p microsoft="" list-style:="" font-size:="" white-space:="" background-color:="" style="color: rgb(51, 51, 51); font-family: 宋体, "Arial Narrow", HELVETICA; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px;">这一架构可使气流的速度因喷截面积的变化而变化，使气流从亚音速到音速，直至加速至跨音速。所以，人们把这种喇叭形喷管叫跨音速喷管、�/p><p microsoft="" list-style:="" font-size:="" white-space:="" background-color:="" style="color: rgb(51, 51, 51); font-family: 宋体, "Arial Narrow", HELVETICA; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px;">由于它是瑞典人拉瓦尔发明的，因此也称�?quot;拉瓦尔喷�?quot;。分析一下拉瓦尔喷管的原理。火箭发动机中的燃气流在燃烧室压力作用下，经过喷管向后运动，进入喷管的A。在这一阶段，燃气运动遵�?quot;流体在管中运动时，截面小处流速大，截面大处流速小"的原理，因此气流不断加速。当到达窄喉时，流速已经超过了音速。而跨音速的流体在运动时却不再遵�?quot;截面小处流速大，截面大处流速小"的原理，而是恰恰相反，截面越大，流速越快。在B，燃气流的速度被进一步加速，�?-3公里/秒，相当于音速的7-8倍，这样就产生了巨大的推力、�/p><p microsoft="" list-style:="" font-size:="" white-space:="" background-color:="" style="color: rgb(51, 51, 51); font-family: 宋体, "Arial Narrow", HELVETICA; font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px;">拉瓦尔喷管实际上起到了一�?quot;流速增大器"的作用。其实，不仅仅是火箭发动机，飞弹的喷管也是这样的喇叭形状的，所以拉瓦尔喷管在武器上有着非常广泛的应用、�/p><p><br/></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; font-size: 14px; margin: 10px 0 0; line-height: 26px;"> 暂无数据� </p> </div>  <div class="xgfa"> <div class="xgfa_tit"> <div> <span></span>相关方案 </div> </div> <div class="xgfa_box" style="display: block;"><div class="xgfa_cont"><a href="//www.znpla.com/sarihs/solution_401.html" target="_blank" class="xgfa_cont_img"><img src=""/></a> <div class="xgfa_cont_rig"><a href="//www.znpla.com/sarihs/solution_401.html" target="_blank">电池材料行业解决方案之气流粉碎机</a> <p class="xgfa_cont_txt">解决方案简介磷酸铁锂是新型电池材料。其特点是放电容量大，价格低廉，无毒性，不造成环境污染。我司设备主要用于磷酸铁锂生产的后端工艺，经过我司设备的处理达到合格粒度要求。与传统的锂离子二次电池正极材料，尖</p><div class="xgfa_cont_time"> <span>电池/电源</span><p>2022-05-27</p></div></div></div> </div> </div> <script> $(function(){ // 切换 $(".xgfa_tit_ul li").hover(function(){ $(".xgfa_tit_ul li").css({"color":"#4F5862","border-bottom-color":"transparent"}); 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