fuel regression rate 燃面退移速率
solid-fuel regression rate 固体燃料退移速率
regression rate of solid fuel 固体燃料退移速率
rate of regression 递减速率
increase rate regression model 增长率回归模型
Of particular importance in the design of hybrid rocket motors is the fuel surface regression rate and the manner in which it varies with operation conditions.
燃面后退速率以及在工作条件改变过程中的变化，对混合发动机的设计有很大的影响。
参考来源 - 固液混合发动机燃烧与燃速特性研究Then, the characters of flow and combustion are analyzed, on which the correlations among average regression rate, air mass flux, air temperature and pass-diameter are obtained. After comparing the calculated results with foreign experimental data, the model is proved reliable.
基于二维定常可压缩N-S方程、标准k～ε湍流模型和涡耗散燃烧模型,建立了SFRJ工作过程仿真模型,分析了发动机内流场流动和燃烧特点,得到平均燃速与空气流量、温度及通道直径之间的关系,并与国外试验数据进行了比较,验证了模型的合理性和准确性。
参考来源 - 固体燃料冲压增程炮弹工作过程仿真及性能分析研究·2,447,543篇论文数据，部分数据来源于NoteExpress
There is a range of applied force over which the regression rate remains constant.
施加的力有一个范围，在这个范围内递减率保持不变。
The three months, though, didn't allot enough time for test, causing an increased regression rate.
尽管这三个月没有足够的时间进行测试，这使递减率不断增加。
The low fuel regression rate in hybrid motor is the principal factor affecting the application of the motor.
固液混合火箭发动机的燃面后退速率低是制约该类发动机应用的主要因素。
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