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一、问题的提出 原来某型发动机的工厂试车要求在磨合运转后,于规定的物理转速（n=11560转/分）下测取发动机涡轮后T_9温度;在给定的换算转速（n_(np)=11560转/分）下测取发动机的换算性能参数,如推力、燃油消耗率、涡轮后T_4温度等。同样,检验试车也要求在物理转速下检查其它有关参数,在换算转速下测取发动机的换算性能参数。这就要求试车工序分成两步进行。工厂试车运转程序例见表1。
First, the problem raised Some of the original factory engine test requires the run-in operation, at the required physical speed (n = 11560 r / min) measured after the engine turbine T_9 temperature; at a given conversion speed (n_ (np ) = 11560 r / min) engine conversion performance parameters measured, such as thrust, fuel consumption, turbine T_4 temperature and so on. Similarly, the test also requires testing of the physical speed under the check of other relevant parameters measured at the conversion speed engine conversion performance parameters. This requires that the commissioning process be divided into two steps. Factory commissioning procedures see Table 1.