火箭研究

A three dimensional Navier Stokes equation is solved with a standard k ε turbulent model. Two experiments were carried out and the total pressure of jet flow was tested. Based on the tests, the differences between the calculated and test results were found to be 3% and 7% respectively. It proved that the results of calculation can well be used in engin...

研究采用数值计算和试验测量相结合的方法，控制方程为三维、雷诺平均 Navier- Stokes方程及 k-ε二方程的紊流模型，并且对该发动机进行了燃气流场的测试，对流场中的总压强进行了直接测量，进行了两次试验；在两次测点位置，试验结果与数值计算值相差分别为 3%和 7%；证明了对双喷管火箭燃气射流流场的数值计算具有了较好的精度，计算模拟结果可以用于工程设计中

To determine the pilot dimensions on which the kinetic stabilization adjustment design of ejection seat depends,regression analysis of 292 pilots' dimensions and their combined gravity centers of pilot-seat systems were conducted. Stature and body weight were determined to be the depending parameters, and the regression equations were derived.

为确定火箭弹射座椅动力稳定调节方法设计所应依据的人体参数，对292例飞行员的人体参数及人椅系统组合重心数据进行了回归分析研究，综合确定了以体重和身高作为调节依据参数，并求出了该参数与人椅系统组合重心的回归方程。

VOA correspondent Brian Wagner was at Cape Canaveral for the president's speech, and I asked him about Mr. Obama's pledge of $3 billion for research on new rockets to power the next phase of exploration.

VOA美国之音记者布赖恩瓦格纳是在卡纳维拉尔角为总统的讲话，我问奥巴马承诺为30亿美元研究新的火箭他权力的下一个阶段的探索。

The MUSCL method of Godunov schemes is developed to simulate the complex flow fields of two-dimensional (2-D) and...

本文首次采用Godunov类数值格式中的MUSCL方法对二维、三维复杂火箭导弹燃气射流冲击流场进行了比较全面系统的理论研究和数值仿真。

The MUSCL method of Godunov schemes is developed to simulate the complex flow fields of two-dimensional (2-D) and three-dimensional (3-D) flow field of rocket jet impingement in this paper.

本文首次采用Godunov类数值格式中的MUSCL方法对二维、三维复杂火箭导弹燃气射流冲击流场进行了比较全面系统的理论研究和数值仿真。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。