Drag reduction technology plays a significant role in extending the flight range for a high-speed vehicle. A wave drag reduction strategy via heat addition to a blunt body with a spike was proposed and numerically validated. The heat addition is simulated with continuous heating in a confined area upstream of the blunt body. The effects of heat addition on drag reduction in three flow conditions () were compared, and the influence of power density (, , and ) of heating was evaluated. Results show that the heat addition has a positive way to reduce the drag of the body with a spike alone, and more satisfactory drag reduction effectiveness can be achieved at a higher Mach number. The drag reduction coefficient increases with in the same flow condition, with a maximum of 38.9% () as . The wave drag reduction principle was discussed by a transient calculation, which indicates that the separation region has entrainment of the heated air and expanded with its sonic line away from the blunt cone, which results in an alleviation of the pressure load caused by shock/shock interaction.

中文翻译：

---

热量对尖刺钝体波浪阻力减小的影响

减阻技术在扩展高速车辆的飞行范围方面起着重要作用。提出了一种通过加热量到带有尖峰的钝体中来降低波浪阻力的策略，并进行了数值验证。通过在钝体上游的密闭区域中连续加热来模拟热量的添加。在三种流动条件下热量添加对减阻的影响（）比较有和功率密度的影响（， ，和）加热的进行评价。结果表明，添加热量有一个积极的方法可以单独降低尖峰来减小车身的阻力，并且在更高的马赫数下可以实现更令人满意的减阻效果。在相同的流量条件下，减阻系数会增加，最大值为38.9％（）为。通过暂态计算讨论了减小波阻力的原理，这表明分离区域夹带了加热的空气并以远离钝锥的声线扩展，从而减轻了由冲击/冲击引起的压力负荷相互作用。