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中国攻克“天眼”新技术 上千架战机直接升级(图)

2017-05-21 15:35:13   中国网

607所是中航工业集团旗下研制机载雷达设备的主要厂家。不久前,607所官方微信透露他们开始为歼-15B战斗机研制新型机载有源相控阵雷达,并透露该雷达的天线技术具有革命性进步。而解放军空军现役战斗机当中,歼-16战斗机所用的有源相控阵雷达也是由该所研制的,据悉,此型雷达对空中目标的探测距离比歼-11BS上所用的机械扫描雷达提高了75%。

不过,也有消息称,歼-16战斗机的雷达在某些工作状态下存在问题,导致在改进前,歼-16战斗机某些功能不得不受到限制。

成飞为巴基斯坦研制的枭龙BLOCK2战斗机,解决了空中加油的问题,也有一些其他局部修改

近日首飞的JF-17B双座战斗机

据资料,上世纪70年代时,大部分战斗机雷达都是用风冷。但进入90年代后,随着发热量大幅度上升,风冷制冷量已经不足,这迫使工程师们开始使用液冷技术,常用的冷却液有乙二醇加水(EGW)或丙二醇加水(PGW)。液冷系统相比风冷系统更加复杂和昂贵,但具有更高的制冷效果。在航空领域,由于高空空气密度低,液冷技术相比风冷更具优势。举例而言,35000英尺高度时,因为空气密度降低,风冷的效率只有水平面高度时的40%。因此,现代有源相控阵雷达都选择了液冷,包括F-22和F-35战斗机的雷达。目前,美国等国正研究双面液冷技术,进一步提高液冷的效率。

通过液冷和风冷的相关对比可以看出,中航雷达所的风冷技术能够运用在机载有源相控阵雷达上的基础,是雷达的天线设计有新的变化,这或许和不久前该所宣称在为歼-15B战斗机研制的新型雷达上采用“超薄”新型天线设计有关。另一方面,采用风冷技术也意味着该型雷达的功率或许要小一些,或者采用了其他特殊设计。

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