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一、序言 针对气体密度小,比热值小的特点,为保证测量精度,应采用流动式测热法来代替固定式测热法。但流动式测热法给实验台的建立带来了很大的困难,首先必须建立稳定的气体流动,二是要尽量降低漏热损失,三是要进行高压密封,以防气体泄漏。在国外,西德和日本都已建立了测量范围较大,精度较高的流动式实验台。在国内,天津大学建立了一个低压下的实验台。本文在实验室现有条件下,建立了一个温度和压力范围较广,并具有一定精度的流动式高压气体比热实验台。
First, the preamble According to the characteristics of small gas density, specific heat value, in order to ensure measurement accuracy, should be used to replace the fixed calorimeter calorimeter. However, the flow calorimetry has brought great difficulties to the establishment of the test bench. First, a stable gas flow must be established. The second is to minimize the heat loss. The third is to carry out high-pressure sealing to prevent gas leakage. Abroad, both West Germany and Japan have established mobile test benches with large measuring range and high precision. In China, Tianjin University has set up a test bench under low pressure. In this paper, under the existing conditions in the laboratory, a large temperature and pressure range, and with a certain accuracy of the flow of high-pressure gas heat test bed.