給氣冷却器に關する考察(第1報)
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概要
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1. The characteristics and the design formula for the engine-air-cooler are discussed. i. The outlet temperature t_2 of the engine air from the cooler is calculated with the aid of the following equations or graphs. i. Parallel-flow type cooler [numerical formula], [numerical formula] counter flow, flow in same direction where [numerical formula] [numerical formula] [numerical formula] [numerical formula] [numerical formula] [numerical formula]: the heat transmission coefficient, The temperature efficiency of the engine air side of the cooler. [numerical formula]: the heat transmission coefficient, The temperature efficiency of the cooling air side of the cooler. [numerical formula] Figs.2〜6 show the relation between η_t' to η_θ, η_t and β. ii. Cross-flow type cooler. The outlet temperature of the engine air or η_t' is obtained with the aid of Nusselt's or Abe's formula. The calculated results are shown in Figs. 10〜13. iii. Indirect type cooling system, using an intermediate heat transfer medium. (Details will be discussed in the third report.) 2. Characteristics of the installed engine-air-cooler system. i. Air flow of the cooling air of the installed engine-air-cooler system. [numerical formula] [numerical formula] ii. The drag horsepower of the cooler [numerical formula] [numerical formula] [numerical formula] Drag horsepower due to the weight W of the cooler [numerical formula] iii. [numerical formula] [numerical formula] [numerical formula] 3. In Chapter 4, the relation of the performance of the engine-air cooler to the limit of the engine output due to knocking is discussed.
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