本文選題：氣相爆震　切入點：馬赫反射　出處：《推進技術(shù)》2016年04期

【摘要】：在矩形爆震管道中,選用具有規(guī)則胞格結(jié)構(gòu)的高濃度氬氣稀釋穩(wěn)態(tài)氣體C2H2-2.5O2-8.17Ar及不規(guī)則胞格結(jié)構(gòu)的非穩(wěn)態(tài)氣體C2H2-5N2O,利用紋影和煙膜實驗對CJ爆震狀態(tài)下的爆震波發(fā)生馬赫反射的轉(zhuǎn)變機理進行了研究。在楔角為30°,5k Pa初始條件下,C2H2-2.5O2-8.17Ar馬赫反射轉(zhuǎn)變時馬赫桿臨界高度約為1.25cm,過驅(qū)胞格結(jié)構(gòu)出現(xiàn)的最小距離略小于胞格長度的1/3;C2H2-5N2O馬赫反射轉(zhuǎn)變時馬赫桿臨界高度約為1.5cm,由于其胞格結(jié)構(gòu)不規(guī)則,故難以衡量過驅(qū)胞格結(jié)構(gòu)出現(xiàn)的位置。實驗結(jié)果表明:爆震波馬赫反射三波點運動軌跡特征為在初始階段遵循無反應(yīng)沖擊波理論,隨后馬赫反射發(fā)生轉(zhuǎn)變使得運動軌跡逐漸平行于反應(yīng)沖擊波理論,從而驗證了爆震波開始形成前導(dǎo)激波馬赫反射,由于CJ區(qū)域內(nèi)三波點的介入引起擾動,最終在馬赫反射區(qū)形成過驅(qū)爆震的過程。
[Abstract]:In a rectangular detonation pipe, High concentration argon diluted steady gas C2H2-2.5O2-8.17Ar and irregular C2H2-5N 2O with regular CJ structure were selected. The transformation mechanism of Mach reflection of detonation wave under CJ detonation state was studied by schlieren and smoke film experiments. When the wedge angle is 30 擄/ 5kPa, the critical height of Mach rod is about 1.25 cm during the Mach reflection transition of C2H2-2.5O2-8.17Ar, and the minimum distance of overdrive lattice structure is slightly smaller than that of Mach rod during the reflection transformation of C2H2-5N2O Mach with the length of C2H2H2-5N2O. About 1.5 cm, due to its irregular cellular structure, Therefore, it is difficult to measure the location of the overdrive lattice structure. The experimental results show that the trajectory of the three-wave point of detonation wave reflection follows the theory of non-reactive shock wave in the initial stage. Then the Mach reflection transition makes the trajectory of motion gradually parallel to the response shock wave theory, which verifies that the detonation wave begins to form the leading shock wave Mach reflection, which is disturbed by the intervention of three wave points in the CJ region. Finally, the process of flooding and detonation was formed in the Mach reflection region.
【作者單位】： 南京理工大學(xué)機械工程學(xué)院;
【基金】：國家自然科學(xué)基金(11172141)
【分類號】：O381

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