摘要
由于阀道内不同部分制冷剂的流动型式不同,有必要求取各部分的热交换系数,因此,本实验将阀道分成三个部分。常规的测量换热系数的方法需要测量温差和传热量,而舌簧阀的尺寸很小,进行这些测量是很困难的。因而,本文应用热—质比拟萘升华方法,通过实验,成功地建立了吸气阀道内部三个不同部分的换热关系式,并导出了描写整个气阀通道的传热关系式。把所建立的换热关系式,引入到压缩机工作过程的数学模拟之中,得到了气阀通道内的过热度和吸气质量流率。
Since the flow patterns of refrigerant are not the same in different areas of valve passage, it is desirable to obtain heat transfer coefficients in these areas. Therefore, the valve passage is divided into three areas in the experiment. Since the reed valve is quite small, it is difficult to measure the heat transfer coefficient by using the classical method requiring measurement of tempertature difference and heat flow, the heat-mass transfer analogy theory—naphthalene sublimation technique has been used. Through experiments, four heat transfer correlations for three local areas and for whole passage in a suction valve have been developed. The correlations have been applied to the compressor simulation, with the consideration of heat transfer in reed valve passage, the temperature of superheated refrigerant in valve passage and the mass flow have been determined.
出处
《流体工程》
CSCD
北大核心
1989年第2期55-58,共4页
