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提供了一种在大口径激波管中降低2区气流雷诺数的方法。采用该方法雷诺数可由通常的10~6～10~7量级降至工10~5量级。实验结果表明采用此方法后2区流场未受明显扰动。给出了驱动压比 P_41与主激波马赫数 M_S1间关系式并由实验加以验证。
A method of reducing the Reynolds number of airflow in Zone 2 in a large-diameter shock tube is provided. Reynolds number by this method can be reduced by the usual 10 ~ 6 ~ 10 ~ 7 order to 10 ~ 5 orders of magnitude. The experimental results show that the flow field in Zone 2 is not disturbed obviously by this method. The relationship between driving pressure ratio P_41 and main shock Mach number M_S1 is given and verified by experiments.