纹影�?参数-价格-中国粉体罐�/title>

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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p><span><strong>Analog Schlierenscope</strong>是来自美国的世界**皃�strong>纹影�?/strong>，具有孔径大，曝光速度快的特点。孔径大小≥200mm，曝光速度达到微秒级别、�/span></p><p><span> 纹影法，又称</span><span>纹影技�?/span><span>，包括黑、白纹影法，彩色纹影法和干涉纹影法，是用<strong>纹影�?/strong>系统进行流场显示和测量的*常用的光学方法。纹影法首先由Toepler�?864年提出，并应用在</span><span>光学玻璃</span><span>折射率的检测中、�/span></p><p><span> 1952� ，Holde和Norht�?strong>纹影�?/strong>系统上使用白光的分光棱镜 ，实现了彩色纹影成象，扩大了纹影技术的应用范围�?962年，Bland和pelick用纹影法研究了水的压力和</span><span>温度效应</span><span>后指出，纹影法实用于水洞 的流场显示；1974� ，Merzkirch对可压缩流场中的纹影技术进行了分类，把涉及到在<strong>纹影�?/strong>系统上进行的干涉纹影法的研究 ，包括光栅干涉、棱镜干涉以及Moire条纹干涉� ，均归类亍�/span><span>纹影技�?/span><span>，并得到国内同行的认可、�/span></p><p><span> 纹影法是利用光在被测流场中的折射率梯度正比于流场的气流密度的原理，将流场中密度梯度的变化转变为记录平面上相对光强的变化，使可压缩流场中的激波、压缩波等密度变化剧烈的区域成为可观察、可分辨的图像，从而记录下来、�/span></p><p><span> 纹影法具有结果简单，成像技术好，精度高等优势，将人眼不可见的流体密度变化转化为光强信息记录下来，使得对流场的观测更为直接形象，特别是彩色纹影技术的发展，使得拍摄的图像更加美观、�/span></p><p><span>纹影法作�?常用的光测方法，在流体力学实验中具有广泛的应用，可用于观测气流的边界层、燃烧、激波、气体内的冷热对流以及风洞或水洞流场、�/span></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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