中文摘要：

介绍了TDLAS技术用于燃烧流场诊断的基本原理，比较了直接吸收法与二次谐波法两种测量方法的优缺点，并对TDLAS技术路径积分测量特性进行了分析。基于单台二极管激光器分别建立了两种方法的TDLAS测量系统，直接吸收法测量重复频率为10kHz，获得了瞬态高温超声速流场温度随时间演化结果；二次谐波法测量重复频率为250Hz，实现了超燃冲压模拟燃烧室温度的在线测量。对于标定燃烧炉甲烷／空气预混火焰，测量系统在1750K时温度A类标准不确定度优于0．7％。

英文摘要：

The principle of tunable diode laser absorption spectroscopy （TDLAS） technique used in combustion diagnostics was introduced. The capabilities and limitations for direct absorption spectroscopy and wavelength modulation spectroscopy were summarized, and the line-of-sight properties of TDLAS technique were analyzed. Two TDLAS systems based on single diode laser were established, the measurement repetition frequency was 10 kHz for direct absorption system, and the evolution temperature of instantaneous supersonic flow was acquired; The measurement repetition frequency was 250 Hz for second harmonic system, and on-line measurements of temperature in supersonic combustor was achieved. For Methane/Air premixed flame in calibration burner, the A type standard uncertainty of temperature was less than 0.7% at the temperature of 1750 K.