net thrust

简明释义

净推力

英英释义

例句

1.By increasing the fuel flow, we can enhance the net thrust produced by the engine.

通过增加燃料流量，我们可以增强发动机产生的净推力。

2.Engineers must calculate the net thrust to ensure that the spacecraft can escape Earth's gravity.

工程师必须计算净推力以确保航天器能够逃离地球引力。

3.The rocket's performance is measured by its net thrust, which indicates the actual force available for propulsion.

火箭的性能通过其净推力来衡量，这表明可用于推进的实际力量。

4.The net thrust of the jet engine was lower than expected, indicating a potential issue.

喷气发动机的净推力低于预期，表明可能存在问题。

5.The net thrust is critical for determining the maximum altitude the aircraft can reach.

对于确定飞机能达到的最大高度，净推力至关重要。

作文

In the field of aerospace engineering, understanding the concept of net thrust is crucial for the design and performance evaluation of propulsion systems. Net thrust refers to the actual thrust produced by an engine after accounting for the thrust losses due to various factors such as drag, friction, and other resistive forces acting against the engine's output. This measurement is essential because it provides a clear picture of how effectively an engine converts fuel into motion, which is vital for both aircraft and spacecraft. To illustrate this further, consider a jet engine. When it operates, it generates thrust by expelling exhaust gases at high speed. However, not all of this thrust contributes to the forward motion of the aircraft. Some of it is countered by aerodynamic drag, which is the resistance an aircraft experiences as it moves through the air. Therefore, to determine the true performance of the engine, engineers must calculate the net thrust. This is done by subtracting the drag force from the total thrust produced by the engine. The formula for calculating net thrust can be expressed as follows: Net Thrust = Total Thrust - Drag Force This equation highlights the importance of both the thrust generated by the engine and the drag experienced by the aircraft. For example, if a jet engine produces a total thrust of 10,000 pounds but the drag force acting on the aircraft is 2,000 pounds, the net thrust would be 8,000 pounds. This means that the effective power available for acceleration or maintaining speed is significantly lower than the total thrust produced. Understanding net thrust is not only important for engineers but also for pilots and operators who need to ensure that their aircraft can perform as expected under various conditions. For instance, during takeoff, a high net thrust is essential for overcoming the weight of the aircraft and achieving lift. Conversely, during cruising at a constant altitude, the net thrust may need to be adjusted to maintain speed while countering drag. Moreover, in space exploration, the concept of net thrust becomes even more critical. Rockets operate in a vacuum where aerodynamic drag is absent, but they must still overcome gravitational forces. The net thrust in this context determines whether a rocket can ascend into space or change its trajectory effectively. Engineers meticulously calculate the required net thrust to ensure that rockets have enough power to reach their intended orbits or destinations. In conclusion, the term net thrust encapsulates a fundamental aspect of propulsion system performance. It plays a vital role in the fields of aviation and space exploration, influencing design choices, operational strategies, and overall efficiency. By accurately calculating and understanding net thrust, engineers and pilots can optimize the performance of their vehicles, ensuring safety and effectiveness in their missions.

在航空航天工程领域，理解净推力的概念对于推进系统的设计和性能评估至关重要。净推力指的是发动机在考虑到由于各种因素（例如阻力、摩擦和其他抵抗力）造成的推力损失后实际产生的推力。这一测量至关重要，因为它提供了一个清晰的图景，展示了发动机将燃料转化为运动的有效性，这对飞机和航天器都是至关重要的。为了进一步说明这一点，考虑一下喷气发动机。当它运转时，通过高速排放废气来产生推力。然而，并非所有的推力都对飞机的前进运动产生贡献。其中一部分被空气动力学阻力所抵消，即飞机在穿越空气时所经历的阻力。因此，为了确定发动机的真正性能，工程师们必须计算净推力。这通过从发动机产生的总推力中减去阻力来完成。计算净推力的公式可以表示如下：净推力 = 总推力 - 阻力这个方程突显了发动机产生的推力和飞机所经历的阻力的重要性。例如，如果一台喷气发动机产生的总推力为10,000磅，但作用于飞机上的阻力为2,000磅，则净推力将为8,000磅。这意味着可用于加速或维持速度的有效功率显著低于产生的总推力。理解净推力不仅对工程师重要，对需要确保飞机在各种条件下按预期执行的飞行员和操作员也同样重要。例如，在起飞过程中，高净推力对于克服飞机的重量并实现升力至关重要。相反，在恒定高度巡航时，可能需要调整净推力以维持速度，同时抵消阻力。此外，在太空探索中，净推力的概念变得更加关键。火箭在真空中运行，空气动力学阻力不存在，但它们仍然必须克服引力。在这种情况下，净推力决定了火箭是否能够有效地升空或改变轨迹。工程师们仔细计算所需的净推力，以确保火箭有足够的动力到达其预定轨道或目的地。总之，净推力这一术语概括了推进系统性能的基本方面。它在航空和太空探索领域发挥着重要作用，影响设计选择、操作策略和整体效率。通过准确计算和理解净推力，工程师和飞行员可以优化他们的车辆性能，确保任务的安全和有效性。